// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#include "recycler/checker.h"

#include <aws/s3/S3Client.h>
#include <aws/s3/model/ListObjectsV2Request.h>
#include <butil/endpoint.h>
#include <butil/strings/string_split.h>
#include <fmt/core.h>
#include <gen_cpp/cloud.pb.h>
#include <gen_cpp/olap_file.pb.h>
#include <glog/logging.h>

#include <algorithm>
#include <chrono>
#include <climits>
#include <cstdint>
#include <functional>
#include <memory>
#include <mutex>
#include <numeric>
#include <sstream>
#include <string_view>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#include "common/bvars.h"
#include "common/config.h"
#include "common/defer.h"
#include "common/encryption_util.h"
#include "common/logging.h"
#include "common/util.h"
#include "cpp/sync_point.h"
#include "meta-service/meta_service.h"
#include "meta-service/meta_service_schema.h"
#include "meta-service/meta_service_tablet_stats.h"
#include "meta-store/blob_message.h"
#include "meta-store/keys.h"
#include "meta-store/txn_kv.h"
#include "snapshot/snapshot_manager_factory.h"
#ifdef ENABLE_HDFS_STORAGE_VAULT
#include "recycler/hdfs_accessor.h"
#endif
#include "recycler/s3_accessor.h"
#include "recycler/storage_vault_accessor.h"
#ifdef UNIT_TEST
#include "../test/mock_accessor.h"
#endif
#include "recycler/recycler.h"
#include "recycler/util.h"

namespace doris::cloud {
namespace config {
extern int32_t brpc_listen_port;
extern int32_t scan_instances_interval_seconds;
extern int32_t recycle_job_lease_expired_ms;
extern int32_t recycle_concurrency;
extern std::vector<std::string> recycle_whitelist;
extern std::vector<std::string> recycle_blacklist;
extern bool enable_inverted_check;
} // namespace config

using namespace std::chrono;

Checker::Checker(std::shared_ptr<TxnKv> txn_kv) : txn_kv_(std::move(txn_kv)) {
    ip_port_ = std::string(butil::my_ip_cstr()) + ":" + std::to_string(config::brpc_listen_port);
}

Checker::~Checker() {
    if (!stopped()) {
        stop();
    }
}

int Checker::start() {
    DCHECK(txn_kv_);
    instance_filter_.reset(config::recycle_whitelist, config::recycle_blacklist);

    // launch instance scanner
    auto scanner_func = [this]() {
        std::this_thread::sleep_for(
                std::chrono::seconds(config::recycler_sleep_before_scheduling_seconds));
        while (!stopped()) {
            std::vector<InstanceInfoPB> instances;
            get_all_instances(txn_kv_.get(), instances);
            LOG(INFO) << "Checker get instances: " << [&instances] {
                std::stringstream ss;
                for (auto& i : instances) ss << ' ' << i.instance_id();
                return ss.str();
            }();
            if (!instances.empty()) {
                // enqueue instances
                std::lock_guard lock(mtx_);
                for (auto& instance : instances) {
                    if (instance_filter_.filter_out(instance.instance_id())) continue;
                    if (instance.status() == InstanceInfoPB::DELETED) continue;
                    using namespace std::chrono;
                    auto enqueue_time_s =
                            duration_cast<seconds>(system_clock::now().time_since_epoch()).count();
                    auto [_, success] =
                            pending_instance_map_.insert({instance.instance_id(), enqueue_time_s});
                    // skip instance already in pending queue
                    if (success) {
                        pending_instance_queue_.push_back(std::move(instance));
                    }
                }
                pending_instance_cond_.notify_all();
            }
            {
                std::unique_lock lock(mtx_);
                notifier_.wait_for(lock,
                                   std::chrono::seconds(config::scan_instances_interval_seconds),
                                   [&]() { return stopped(); });
            }
        }
    };
    workers_.emplace_back(scanner_func);
    // Launch lease thread
    workers_.emplace_back([this] { lease_check_jobs(); });
    // Launch inspect thread
    workers_.emplace_back([this] { inspect_instance_check_interval(); });

    // launch check workers
    auto checker_func = [this]() {
        while (!stopped()) {
            // fetch instance to check
            InstanceInfoPB instance;
            long enqueue_time_s = 0;
            {
                std::unique_lock lock(mtx_);
                pending_instance_cond_.wait(lock, [&]() -> bool {
                    return !pending_instance_queue_.empty() || stopped();
                });
                if (stopped()) {
                    return;
                }
                instance = std::move(pending_instance_queue_.front());
                pending_instance_queue_.pop_front();
                enqueue_time_s = pending_instance_map_[instance.instance_id()];
                pending_instance_map_.erase(instance.instance_id());
            }
            const auto& instance_id = instance.instance_id();
            {
                std::lock_guard lock(mtx_);
                // skip instance in recycling
                if (working_instance_map_.count(instance_id)) {
                    LOG(INFO) << "checker skip instance already working, instance_id="
                              << instance_id;
                    continue;
                }
            }
            auto checker = std::make_shared<InstanceChecker>(txn_kv_, instance.instance_id());
            if (checker->init(instance) != 0) {
                LOG(WARNING) << "failed to init instance checker, instance_id="
                             << instance.instance_id();
                continue;
            }
            std::string check_job_key;
            job_check_key({instance.instance_id()}, &check_job_key);
            LOG(INFO) << "checker picked instance, instance_id=" << instance.instance_id()
                      << " enqueue_time_s=" << enqueue_time_s;
            int ret = prepare_instance_recycle_job(txn_kv_.get(), check_job_key,
                                                   instance.instance_id(), ip_port_,
                                                   config::check_object_interval_seconds * 1000);
            if (ret != 0) { // Prepare failed
                LOG(WARNING) << "checker prepare job failed, instance_id=" << instance.instance_id()
                             << " ret=" << ret;
                continue;
            } else {
                std::lock_guard lock(mtx_);
                working_instance_map_.emplace(instance_id, checker);
            }
            if (stopped()) return;
            using namespace std::chrono;
            auto ctime_ms =
                    duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
            g_bvar_checker_enqueue_cost_s.put(instance_id, ctime_ms / 1000 - enqueue_time_s);

            bool success {true};
            auto log_progress = [&](std::string_view stage) {
                LOG(INFO) << "checker progress, instance_id=" << instance_id << " stage=" << stage;
            };

            log_progress("do_check");
            if (int ret = checker->do_check(); ret != 0) {
                success = false;
            }

            if (config::enable_inverted_check) {
                log_progress("do_inverted_check");
                if (int ret = checker->do_inverted_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_delete_bitmap_inverted_check) {
                log_progress("do_delete_bitmap_inverted_check");
                if (int ret = checker->do_delete_bitmap_inverted_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_mow_job_key_check) {
                log_progress("do_mow_job_key_check");
                if (int ret = checker->do_mow_job_key_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_tablet_stats_key_check) {
                log_progress("do_tablet_stats_key_check");
                if (int ret = checker->do_tablet_stats_key_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_restore_job_check) {
                log_progress("do_restore_job_check");
                if (int ret = checker->do_restore_job_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_txn_key_check) {
                log_progress("do_txn_key_check");
                if (int ret = checker->do_txn_key_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_meta_rowset_key_check) {
                log_progress("do_meta_rowset_key_check");
                if (int ret = checker->do_meta_rowset_key_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_delete_bitmap_storage_optimize_v2_check) {
                log_progress("do_delete_bitmap_storage_optimize_check_v2");
                if (int ret = checker->do_delete_bitmap_storage_optimize_check(2 /*version*/);
                    ret != 0) {
                    success = false;
                }
            }

            if (config::enable_version_key_check) {
                log_progress("do_version_key_check");
                if (int ret = checker->do_version_key_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_snapshot_check) {
                log_progress("do_snapshots_check");
                if (int ret = checker->do_snapshots_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_mvcc_meta_key_check) {
                log_progress("do_mvcc_meta_key_check");
                if (int ret = checker->do_mvcc_meta_key_check(); ret != 0) {
                    success = false;
                }
            }

            if (config::enable_packed_file_check) {
                log_progress("do_packed_file_check");
                if (int ret = checker->do_packed_file_check(); ret != 0) {
                    success = false;
                }
            }

            // If instance checker has been aborted, don't finish this job
            if (!checker->stopped()) {
                finish_instance_recycle_job(txn_kv_.get(), check_job_key, instance.instance_id(),
                                            ip_port_, success, ctime_ms);
            }
            LOG(INFO) << "checker finished instance, instance_id=" << instance.instance_id()
                      << " success=" << success;
            {
                std::lock_guard lock(mtx_);
                working_instance_map_.erase(instance.instance_id());
            }
        }
    };
    int num_threads = config::recycle_concurrency; // FIXME: use a new config entry?
    for (int i = 0; i < num_threads; ++i) {
        workers_.emplace_back(checker_func);
    }
    return 0;
}

void Checker::stop() {
    stopped_ = true;
    notifier_.notify_all();
    pending_instance_cond_.notify_all();
    {
        std::lock_guard lock(mtx_);
        for (auto& [_, checker] : working_instance_map_) {
            checker->stop();
        }
    }
    for (auto& w : workers_) {
        if (w.joinable()) w.join();
    }
}

void Checker::lease_check_jobs() {
    while (!stopped()) {
        std::vector<std::string> instances;
        instances.reserve(working_instance_map_.size());
        {
            std::lock_guard lock(mtx_);
            for (auto& [id, _] : working_instance_map_) {
                instances.push_back(id);
            }
        }
        for (auto& i : instances) {
            std::string check_job_key;
            job_check_key({i}, &check_job_key);
            int ret = lease_instance_recycle_job(txn_kv_.get(), check_job_key, i, ip_port_);
            if (ret == 1) {
                std::lock_guard lock(mtx_);
                if (auto it = working_instance_map_.find(i); it != working_instance_map_.end()) {
                    it->second->stop();
                }
            }
        }
        {
            std::unique_lock lock(mtx_);
            notifier_.wait_for(lock,
                               std::chrono::milliseconds(config::recycle_job_lease_expired_ms / 3),
                               [&]() { return stopped(); });
        }
    }
}
#define LOG_CHECK_INTERVAL_ALARM LOG(WARNING) << "Err for check interval: "
void Checker::do_inspect(const InstanceInfoPB& instance) {
    std::string check_job_key = job_check_key({instance.instance_id()});
    std::unique_ptr<Transaction> txn;
    std::string val;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG_CHECK_INTERVAL_ALARM << "failed to create txn";
        return;
    }
    err = txn->get(check_job_key, &val);
    if (err != TxnErrorCode::TXN_OK && err != TxnErrorCode::TXN_KEY_NOT_FOUND) {
        LOG_CHECK_INTERVAL_ALARM << "failed to get kv, err=" << err
                                 << " key=" << hex(check_job_key);
        return;
    }
    auto checker = InstanceChecker(txn_kv_, instance.instance_id());
    if (checker.init(instance) != 0) {
        LOG_CHECK_INTERVAL_ALARM << "failed to init instance checker, instance_id="
                                 << instance.instance_id();
        return;
    }

    int64_t bucket_lifecycle_days = 0;
    if (checker.get_bucket_lifecycle(&bucket_lifecycle_days) != 0) {
        LOG_CHECK_INTERVAL_ALARM << "failed to get bucket lifecycle, instance_id="
                                 << instance.instance_id();
        return;
    }
    DCHECK(bucket_lifecycle_days > 0);

    if (bucket_lifecycle_days == INT64_MAX) {
        // No s3 bucket (may all accessors are HdfsAccessor), skip inspect
        return;
    }

    int64_t last_ctime_ms = -1;
    auto job_status = JobRecyclePB::IDLE;
    auto has_last_ctime = [&]() {
        JobRecyclePB job_info;
        if (!job_info.ParseFromString(val)) {
            LOG_CHECK_INTERVAL_ALARM << "failed to parse JobRecyclePB, key=" << hex(check_job_key);
        }
        DCHECK(job_info.instance_id() == instance.instance_id());
        if (!job_info.has_last_ctime_ms()) return false;
        last_ctime_ms = job_info.last_ctime_ms();
        job_status = job_info.status();
        g_bvar_checker_last_success_time_ms.put(instance.instance_id(),
                                                job_info.last_success_time_ms());
        return true;
    };
    using namespace std::chrono;
    auto now = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
    if (err == TxnErrorCode::TXN_KEY_NOT_FOUND || !has_last_ctime()) {
        // Use instance's ctime for instances that do not have job's last ctime
        last_ctime_ms = instance.ctime();
    }
    DCHECK(now - last_ctime_ms >= 0);
    int64_t expiration_ms =
            bucket_lifecycle_days > config::reserved_buffer_days
                    ? (bucket_lifecycle_days - config::reserved_buffer_days) * 86400000
                    : bucket_lifecycle_days * 86400000;
    TEST_SYNC_POINT_CALLBACK("Checker:do_inspect", &last_ctime_ms);
    if (now - last_ctime_ms >= expiration_ms) {
        LOG_CHECK_INTERVAL_ALARM << "check risks, instance_id: " << instance.instance_id()
                                 << " last_ctime_ms: " << last_ctime_ms
                                 << " job_status: " << job_status
                                 << " bucket_lifecycle_days: " << bucket_lifecycle_days
                                 << " reserved_buffer_days: " << config::reserved_buffer_days
                                 << " expiration_ms: " << expiration_ms;
    }
}
#undef LOG_CHECK_INTERVAL_ALARM
void Checker::inspect_instance_check_interval() {
    while (!stopped()) {
        LOG(INFO) << "start to inspect instance check interval";
        std::vector<InstanceInfoPB> instances;
        get_all_instances(txn_kv_.get(), instances);
        for (const auto& instance : instances) {
            if (instance_filter_.filter_out(instance.instance_id())) continue;
            if (stopped()) return;
            if (instance.status() == InstanceInfoPB::DELETED) continue;
            do_inspect(instance);
        }
        {
            std::unique_lock lock(mtx_);
            notifier_.wait_for(lock, std::chrono::seconds(config::scan_instances_interval_seconds),
                               [&]() { return stopped(); });
        }
    }
}

// return 0 for success get a key, 1 for key not found, negative for error
int key_exist(TxnKv* txn_kv, std::string_view key) {
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to init txn, err=" << err;
        return -1;
    }
    std::string val;
    switch (txn->get(key, &val)) {
    case TxnErrorCode::TXN_OK:
        return 0;
    case TxnErrorCode::TXN_KEY_NOT_FOUND:
        return 1;
    default:
        return -1;
    }
}

InstanceChecker::InstanceChecker(std::shared_ptr<TxnKv> txn_kv, const std::string& instance_id)
        : txn_kv_(txn_kv), instance_id_(instance_id) {
    snapshot_manager_ = create_snapshot_manager(txn_kv);
    resource_mgr_ = std::make_shared<ResourceManager>(std::move(txn_kv));
    resource_mgr_->init();
}

int InstanceChecker::init(const InstanceInfoPB& instance) {
    int ret = init_obj_store_accessors(instance);
    if (ret != 0) {
        return ret;
    }

    return init_storage_vault_accessors(instance);
}

int InstanceChecker::init_obj_store_accessors(const InstanceInfoPB& instance) {
    for (const auto& obj_info : instance.obj_info()) {
#ifdef UNIT_TEST
        auto accessor = std::make_shared<MockAccessor>();
#else
        auto s3_conf = S3Conf::from_obj_store_info(obj_info);
        if (!s3_conf) {
            LOG(WARNING) << "failed to init object accessor, instance_id=" << instance_id_;
            return -1;
        }

        std::shared_ptr<S3Accessor> accessor;
        int ret = S3Accessor::create(std::move(*s3_conf), &accessor);
        if (ret != 0) {
            LOG(WARNING) << "failed to init object accessor. instance_id=" << instance_id_
                         << " resource_id=" << obj_info.id();
            return ret;
        }
#endif

        accessor_map_.emplace(obj_info.id(), std::move(accessor));
    }

    return 0;
}

int InstanceChecker::init_storage_vault_accessors(const InstanceInfoPB& instance) {
    if (instance.resource_ids().empty()) {
        return 0;
    }

    FullRangeGetOptions opts(txn_kv_);
    opts.prefetch = true;
    auto it = txn_kv_->full_range_get(storage_vault_key({instance_id_, ""}),
                                      storage_vault_key({instance_id_, "\xff"}), std::move(opts));

    for (auto kv = it->next(); kv.has_value(); kv = it->next()) {
        auto [k, v] = *kv;
        StorageVaultPB vault;
        if (!vault.ParseFromArray(v.data(), v.size())) {
            LOG(WARNING) << "malformed storage vault, unable to deserialize key=" << hex(k);
            return -1;
        }
        TEST_SYNC_POINT_CALLBACK("InstanceRecycler::init_storage_vault_accessors.mock_vault",
                                 &accessor_map_, &vault);
        if (vault.has_hdfs_info()) {
#ifdef ENABLE_HDFS_STORAGE_VAULT
            auto accessor = std::make_shared<HdfsAccessor>(vault.hdfs_info());
            int ret = accessor->init();
            if (ret != 0) {
                LOG(WARNING) << "failed to init hdfs accessor. instance_id=" << instance_id_
                             << " resource_id=" << vault.id() << " name=" << vault.name();
                return ret;
            }

            accessor_map_.emplace(vault.id(), std::move(accessor));
#else
            LOG(ERROR) << "HDFS is disabled (via the ENABLE_HDFS_STORAGE_VAULT build option), "
                       << "but HDFS storage vaults were detected";
#endif
        } else if (vault.has_obj_info()) {
#ifdef UNIT_TEST
            auto accessor = std::make_shared<MockAccessor>();
#else
            auto s3_conf = S3Conf::from_obj_store_info(vault.obj_info());
            if (!s3_conf) {
                LOG(WARNING) << "failed to init object accessor, instance_id=" << instance_id_;
                return -1;
            }

            std::shared_ptr<S3Accessor> accessor;
            int ret = S3Accessor::create(std::move(*s3_conf), &accessor);
            if (ret != 0) {
                LOG(WARNING) << "failed to init s3 accessor. instance_id=" << instance_id_
                             << " resource_id=" << vault.id() << " name=" << vault.name();
                return ret;
            }
#endif

            accessor_map_.emplace(vault.id(), std::move(accessor));
        }
    }

    if (!it->is_valid()) {
        LOG_WARNING("failed to get storage vault kv");
        return -1;
    }
    return 0;
}

int InstanceChecker::do_check() {
    TEST_SYNC_POINT("InstanceChecker.do_check");
    LOG(INFO) << "begin to check instance objects instance_id=" << instance_id_;
    int check_ret = 0;
    long num_scanned = 0;
    long num_scanned_with_segment = 0;
    long num_rowset_loss = 0;
    long instance_volume = 0;
    using namespace std::chrono;
    auto start_time = steady_clock::now();
    DORIS_CLOUD_DEFER {
        auto cost = duration<float>(steady_clock::now() - start_time).count();
        LOG(INFO) << "check instance objects finished, cost=" << cost
                  << "s. instance_id=" << instance_id_ << " num_scanned=" << num_scanned
                  << " num_scanned_with_segment=" << num_scanned_with_segment
                  << " num_rowset_loss=" << num_rowset_loss
                  << " instance_volume=" << instance_volume;
        g_bvar_checker_num_scanned.put(instance_id_, num_scanned);
        g_bvar_checker_num_scanned_with_segment.put(instance_id_, num_scanned_with_segment);
        g_bvar_checker_num_check_failed.put(instance_id_, num_rowset_loss);
        g_bvar_checker_check_cost_s.put(instance_id_, static_cast<long>(cost));
        // FIXME(plat1ko): What if some list operation failed?
        g_bvar_checker_instance_volume.put(instance_id_, instance_volume);
    };

    struct TabletFiles {
        int64_t tablet_id {0};
        std::unordered_set<std::string> files;
    };
    TabletFiles tablet_files_cache;

    auto check_rowset_objects = [&, this](doris::RowsetMetaCloudPB& rs_meta, std::string_view key) {
        if (rs_meta.num_segments() == 0) {
            return;
        }

        bool data_loss = false;
        bool segment_file_loss = false;
        bool index_file_loss = false;

        DORIS_CLOUD_DEFER {
            if (data_loss) {
                LOG(INFO) << "segment file is" << (segment_file_loss ? "" : " not") << " loss, "
                          << "index file is" << (index_file_loss ? "" : " not") << " loss, "
                          << "rowset.tablet_id = " << rs_meta.tablet_id();
                num_rowset_loss++;
            }
        };

        ++num_scanned_with_segment;
        if (tablet_files_cache.tablet_id != rs_meta.tablet_id()) {
            long tablet_volume = 0;
            // Clear cache
            tablet_files_cache.tablet_id = 0;
            tablet_files_cache.files.clear();
            // Get all file paths under this tablet directory
            auto find_it = accessor_map_.find(rs_meta.resource_id());
            if (find_it == accessor_map_.end()) {
                LOG_WARNING("resource id not found in accessor map")
                        .tag("resource_id", rs_meta.resource_id())
                        .tag("tablet_id", rs_meta.tablet_id())
                        .tag("rowset_id", rs_meta.rowset_id_v2());
                check_ret = -1;
                return;
            }

            std::unique_ptr<ListIterator> list_iter;
            int ret = find_it->second->list_directory(tablet_path_prefix(rs_meta.tablet_id()),
                                                      &list_iter);
            if (ret != 0) { // No need to log, because S3Accessor has logged this error
                check_ret = -1;
                return;
            }

            for (auto file = list_iter->next(); file.has_value(); file = list_iter->next()) {
                tablet_files_cache.files.insert(std::move(file->path));
                tablet_volume += file->size;
            }
            tablet_files_cache.tablet_id = rs_meta.tablet_id();
            instance_volume += tablet_volume;
        }

        for (int i = 0; i < rs_meta.num_segments(); ++i) {
            auto path = segment_path(rs_meta.tablet_id(), rs_meta.rowset_id_v2(), i);

            // Skip check if segment is already packed into a larger file
            const auto& index_map = rs_meta.packed_slice_locations();
            if (index_map.find(path) != index_map.end()) {
                continue;
            }

            if (tablet_files_cache.files.contains(path)) {
                continue;
            }

            if (1 == key_exist(txn_kv_.get(), key)) {
                // Rowset has been deleted instead of data loss
                break;
            }
            data_loss = true;
            segment_file_loss = true;
            TEST_SYNC_POINT_CALLBACK("InstanceChecker.do_check1", &path);
            LOG(WARNING) << "object not exist, path=" << path
                         << ", rs_meta=" << rs_meta.ShortDebugString() << " key=" << hex(key);
        }

        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to init txn, err=" << err;
            check_ret = -1;
            return;
        }

        TabletIndexPB tablet_index;
        if (get_tablet_idx(txn_kv_.get(), instance_id_, rs_meta.tablet_id(), tablet_index) == -1) {
            LOG(WARNING) << "failed to get tablet index, tablet_id= " << rs_meta.tablet_id();
            check_ret = -1;
            return;
        }

        auto tablet_schema_key =
                meta_schema_key({instance_id_, tablet_index.index_id(), rs_meta.schema_version()});
        ValueBuf tablet_schema_val;
        err = cloud::blob_get(txn.get(), tablet_schema_key, &tablet_schema_val);

        if (err != TxnErrorCode::TXN_OK) {
            check_ret = -1;
            LOG(WARNING) << "failed to get schema, err=" << err;
            return;
        }

        auto* schema = rs_meta.mutable_tablet_schema();
        if (!parse_schema_value(tablet_schema_val, schema)) {
            LOG(WARNING) << "malformed schema value, key=" << hex(tablet_schema_key);
            return;
        }

        std::vector<std::pair<int64_t, std::string>> index_ids;
        for (const auto& i : rs_meta.tablet_schema().index()) {
            if (i.has_index_type() && i.index_type() == IndexType::INVERTED) {
                index_ids.emplace_back(i.index_id(), i.index_suffix_name());
            }
        }
        if (!index_ids.empty()) {
            const auto& index_map = rs_meta.packed_slice_locations();
            for (int i = 0; i < rs_meta.num_segments(); ++i) {
                std::vector<std::string> index_path_v;
                if (rs_meta.tablet_schema().inverted_index_storage_format() ==
                    InvertedIndexStorageFormatPB::V1) {
                    for (const auto& index_id : index_ids) {
                        LOG(INFO) << "check inverted index, tablet_id=" << rs_meta.tablet_id()
                                  << " rowset_id=" << rs_meta.rowset_id_v2() << " segment_id=" << i
                                  << " index_id=" << index_id.first
                                  << " index_suffix_name=" << index_id.second;
                        index_path_v.emplace_back(
                                inverted_index_path_v1(rs_meta.tablet_id(), rs_meta.rowset_id_v2(),
                                                       i, index_id.first, index_id.second));
                    }
                } else {
                    index_path_v.emplace_back(
                            inverted_index_path_v2(rs_meta.tablet_id(), rs_meta.rowset_id_v2(), i));
                }

                if (std::ranges::all_of(index_path_v, [&](const auto& idx_file_path) {
                        // Skip check if inverted index file is already packed into a larger file
                        if (index_map.find(idx_file_path) != index_map.end()) {
                            return true;
                        }
                        if (!tablet_files_cache.files.contains(idx_file_path)) {
                            LOG(INFO) << "loss index file: " << idx_file_path;
                            return false;
                        }
                        return true;
                    })) {
                    continue;
                }
                index_file_loss = true;
                data_loss = true;
            }
        }
    };

    // scan visible rowsets
    auto start_key = meta_rowset_key({instance_id_, 0, 0});
    auto end_key = meta_rowset_key({instance_id_, INT64_MAX, 0});

    std::unique_ptr<RangeGetIterator> it;
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to init txn, err=" << err;
            return -1;
        }

        err = txn->get(start_key, end_key, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "internal error, failed to get rowset meta, err=" << err;
            return -1;
        }
        num_scanned += it->size();

        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            if (!it->has_next()) {
                start_key = k;
            }

            doris::RowsetMetaCloudPB rs_meta;
            if (!rs_meta.ParseFromArray(v.data(), v.size())) {
                ++num_rowset_loss;
                LOG(WARNING) << "malformed rowset meta. key=" << hex(k) << " val=" << hex(v);
                continue;
            }
            check_rowset_objects(rs_meta, k);
        }
        start_key.push_back('\x00'); // Update to next smallest key for iteration
    }

    return num_rowset_loss > 0 ? 1 : check_ret;
}

int InstanceChecker::get_bucket_lifecycle(int64_t* lifecycle_days) {
    // If there are multiple buckets, return the minimum lifecycle.
    int64_t min_lifecycle_days = INT64_MAX;
    int64_t tmp_liefcycle_days = 0;
    for (const auto& [id, accessor] : accessor_map_) {
        if (accessor->type() != AccessorType::S3) {
            continue;
        }

        auto* s3_accessor = static_cast<S3Accessor*>(accessor.get());

        if (s3_accessor->check_versioning() != 0) {
            return -1;
        }

        if (s3_accessor->get_life_cycle(&tmp_liefcycle_days) != 0) {
            return -1;
        }

        if (tmp_liefcycle_days < min_lifecycle_days) {
            min_lifecycle_days = tmp_liefcycle_days;
        }
    }
    *lifecycle_days = min_lifecycle_days;
    return 0;
}

int InstanceChecker::do_inverted_check() {
    if (accessor_map_.size() > 1) {
        LOG(INFO) << "currently not support inverted check for multi accessor. instance_id="
                  << instance_id_;
        return 0;
    }

    LOG(INFO) << "begin to inverted check objects instance_id=" << instance_id_;
    int check_ret = 0;
    long num_scanned = 0;
    long num_file_leak = 0;
    using namespace std::chrono;
    auto start_time = steady_clock::now();
    DORIS_CLOUD_DEFER {
        g_bvar_inverted_checker_num_scanned.put(instance_id_, num_scanned);
        g_bvar_inverted_checker_num_check_failed.put(instance_id_, num_file_leak);
        auto cost = duration<float>(steady_clock::now() - start_time).count();
        LOG(INFO) << "inverted check instance objects finished, cost=" << cost
                  << "s. instance_id=" << instance_id_ << " num_scanned=" << num_scanned
                  << " num_file_leak=" << num_file_leak;
    };

    struct TabletRowsets {
        int64_t tablet_id {0};
        std::unordered_set<std::string> rowset_ids;
    };
    TabletRowsets tablet_rowsets_cache;

    RowsetIndexesFormatV1 rowset_index_cache_v1;
    RowsetIndexesFormatV2 rowset_index_cache_v2;

    // Return 0 if check success, return 1 if file is garbage data, negative if error occurred
    auto check_segment_file = [&](const std::string& obj_key) {
        std::vector<std::string> str;
        butil::SplitString(obj_key, '/', &str);
        // data/{tablet_id}/{rowset_id}_{seg_num}.dat
        if (str.size() < 3) {
            // clang-format off
            LOG(WARNING) << "split obj_key error, str.size() should be less than 3,"
                         << " value = " << str.size();
            // clang-format on
            return -1;
        }

        int64_t tablet_id = atol(str[1].c_str());
        if (tablet_id <= 0) {
            LOG(WARNING) << "failed to parse tablet_id, key=" << obj_key;
            return -1;
        }

        if (!str[2].ends_with(".dat")) {
            // skip check not segment file
            return 0;
        }

        std::string rowset_id;
        if (auto pos = str.back().find('_'); pos != std::string::npos) {
            rowset_id = str.back().substr(0, pos);
        } else {
            LOG(WARNING) << "failed to parse rowset_id, key=" << obj_key;
            return -1;
        }

        if (tablet_rowsets_cache.tablet_id == tablet_id) {
            if (tablet_rowsets_cache.rowset_ids.contains(rowset_id)) {
                return 0;
            } else {
                LOG(WARNING) << "rowset not exists, key=" << obj_key;
                return -1;
            }
        }
        // Get all rowset id of this tablet
        tablet_rowsets_cache.tablet_id = tablet_id;
        tablet_rowsets_cache.rowset_ids.clear();
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        std::unique_ptr<RangeGetIterator> it;
        auto begin = meta_rowset_key({instance_id_, tablet_id, 0});
        auto end = meta_rowset_key({instance_id_, tablet_id, INT64_MAX});
        while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
            TxnErrorCode err = txn->get(begin, end, &it);
            if (err != TxnErrorCode::TXN_OK) {
                LOG(WARNING) << "failed to get rowset kv, err=" << err;
                return -1;
            }
            if (!it->has_next()) {
                break;
            }
            while (it->has_next()) {
                // recycle corresponding resources
                auto [k, v] = it->next();
                doris::RowsetMetaCloudPB rowset;
                if (!rowset.ParseFromArray(v.data(), v.size())) {
                    LOG(WARNING) << "malformed rowset meta value, key=" << hex(k);
                    return -1;
                }
                tablet_rowsets_cache.rowset_ids.insert(rowset.rowset_id_v2());
                if (!it->has_next()) {
                    begin = k;
                    begin.push_back('\x00'); // Update to next smallest key for iteration
                    break;
                }
            }
        }

        if (!tablet_rowsets_cache.rowset_ids.contains(rowset_id)) {
            // Garbage data leak
            LOG(WARNING) << "rowset should be recycled, key=" << obj_key;
            return 1;
        }

        return 0;
    };

    auto check_inverted_index_file = [&](const std::string& obj_key) {
        std::vector<std::string> str;
        butil::SplitString(obj_key, '/', &str);
        // format v1: data/{tablet_id}/{rowset_id}_{seg_num}_{idx_id}{idx_suffix}.idx
        // format v2: data/{tablet_id}/{rowset_id}_{seg_num}.idx
        if (str.size() < 3) {
            // clang-format off
            LOG(WARNING) << "split obj_key error, str.size() should be less than 3,"
                         << " value = " << str.size();
            // clang-format on
            return -1;
        }

        int64_t tablet_id = atol(str[1].c_str());
        if (tablet_id <= 0) {
            LOG(WARNING) << "failed to parse tablet_id, key=" << obj_key;
            return -1;
        }

        // v1: {rowset_id}_{seg_num}_{idx_id}{idx_suffix}.idx
        // v2: {rowset_id}_{seg_num}.idx
        std::string rowset_info = str.back();

        if (!rowset_info.ends_with(".idx")) {
            return 0; // Not an index file
        }

        InvertedIndexStorageFormatPB inverted_index_storage_format =
                std::count(rowset_info.begin(), rowset_info.end(), '_') > 1
                        ? InvertedIndexStorageFormatPB::V1
                        : InvertedIndexStorageFormatPB::V2;

        size_t pos = rowset_info.find_last_of('_');
        if (pos == std::string::npos || pos + 1 >= str.back().size() - 4) {
            LOG(WARNING) << "Invalid index_id format, key=" << obj_key;
            return -1;
        }
        if (inverted_index_storage_format == InvertedIndexStorageFormatPB::V1) {
            return check_inverted_index_file_storage_format_v1(tablet_id, obj_key, rowset_info,
                                                               rowset_index_cache_v1);
        } else {
            return check_inverted_index_file_storage_format_v2(tablet_id, obj_key, rowset_info,
                                                               rowset_index_cache_v2);
        }
    };
    // so we choose to skip here.
    TEST_SYNC_POINT_RETURN_WITH_VALUE("InstanceChecker::do_inverted_check", (int)0);

    for (auto& [_, accessor] : accessor_map_) {
        std::unique_ptr<ListIterator> list_iter;
        int ret = accessor->list_directory("data", &list_iter);
        if (ret != 0) {
            return -1;
        }

        for (auto file = list_iter->next(); file.has_value(); file = list_iter->next()) {
            const auto& path = file->path;
            if (path == "data/packed_file" || path.starts_with("data/packed_file/")) {
                continue; // packed_file has dedicated check logic
            }
            ++num_scanned;
            int ret = check_segment_file(path);
            if (ret != 0) {
                LOG(WARNING) << "failed to check segment file, uri=" << accessor->uri()
                             << " path=" << path;
                if (ret == 1) {
                    ++num_file_leak;
                } else {
                    check_ret = -1;
                }
            }
            ret = check_inverted_index_file(path);
            if (ret != 0) {
                LOG(WARNING) << "failed to check index file, uri=" << accessor->uri()
                             << " path=" << path;
                if (ret == 1) {
                    ++num_file_leak;
                } else {
                    check_ret = -1;
                }
            }
        }

        if (!list_iter->is_valid()) {
            LOG(WARNING) << "failed to list data directory. uri=" << accessor->uri();
            return -1;
        }
    }
    return num_file_leak > 0 ? 1 : check_ret;
}

int InstanceChecker::traverse_mow_tablet(const std::function<int(int64_t, bool)>& check_func) {
    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_rowset_key({instance_id_, 0, 0});
    auto end = meta_rowset_key({instance_id_, std::numeric_limits<int64_t>::max(), 0});
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &it, false, 1);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get rowset kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            std::string_view k1 = k;
            k1.remove_prefix(1);
            std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
            decode_key(&k1, &out);
            // 0x01 "meta" ${instance_id} "rowset" ${tablet_id} ${version} -> RowsetMetaCloudPB
            auto tablet_id = std::get<int64_t>(std::get<0>(out[3]));

            if (!it->has_next()) {
                // Update to next smallest key for iteration
                // scan for next tablet in this instance
                begin = meta_rowset_key({instance_id_, tablet_id + 1, 0});
            }

            TabletMetaCloudPB tablet_meta;
            int ret = get_tablet_meta(txn_kv_.get(), instance_id_, tablet_id, tablet_meta);
            if (ret < 0) {
                LOG(WARNING) << fmt::format(
                        "failed to get_tablet_meta in do_delete_bitmap_integrity_check(), "
                        "instance_id={}, tablet_id={}",
                        instance_id_, tablet_id);
                return ret;
            }

            if (tablet_meta.enable_unique_key_merge_on_write()) {
                // only check merge-on-write table
                bool has_sequence_col = tablet_meta.schema().has_sequence_col_idx() &&
                                        tablet_meta.schema().sequence_col_idx() != -1;
                int ret = check_func(tablet_id, has_sequence_col);
                if (ret < 0) {
                    // return immediately when encounter unexpected error,
                    // otherwise, we continue to check the next tablet
                    return ret;
                }
            }
        }
    }
    return 0;
}

int InstanceChecker::traverse_rowset_delete_bitmaps(
        int64_t tablet_id, std::string rowset_id,
        const std::function<int(int64_t, std::string_view, int64_t, int64_t)>& callback) {
    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_delete_bitmap_key({instance_id_, tablet_id, rowset_id, 0, 0});
    auto end = meta_delete_bitmap_key({instance_id_, tablet_id, rowset_id,
                                       std::numeric_limits<int64_t>::max(),
                                       std::numeric_limits<int64_t>::max()});
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get rowset kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            std::string_view k1 = k;
            k1.remove_prefix(1);
            std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
            decode_key(&k1, &out);
            // 0x01 "meta" ${instance_id} "delete_bitmap" ${tablet_id} ${rowset_id} ${version} ${segment_id} -> roaringbitmap
            auto version = std::get<std::int64_t>(std::get<0>(out[5]));
            auto segment_id = std::get<std::int64_t>(std::get<0>(out[6]));

            int ret = callback(tablet_id, rowset_id, version, segment_id);
            if (ret != 0) {
                return ret;
            }

            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
                break;
            }
        }
    }

    return 0;
}

int InstanceChecker::collect_tablet_rowsets(
        int64_t tablet_id, const std::function<void(const doris::RowsetMetaCloudPB&)>& collect_cb) {
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to create txn";
        return -1;
    }
    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_rowset_key({instance_id_, tablet_id, 0});
    auto end = meta_rowset_key({instance_id_, tablet_id + 1, 0});

    int64_t rowsets_num {0};
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        TxnErrorCode err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get rowset kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            doris::RowsetMetaCloudPB rowset;
            if (!rowset.ParseFromArray(v.data(), v.size())) {
                LOG(WARNING) << "malformed rowset meta value, key=" << hex(k);
                return -1;
            }

            ++rowsets_num;
            collect_cb(rowset);

            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
                break;
            }
        }
    }

    LOG(INFO) << fmt::format(
            "[delete bitmap checker] successfully collect rowsets for instance_id={}, "
            "tablet_id={}, rowsets_num={}",
            instance_id_, tablet_id, rowsets_num);
    return 0;
}

int InstanceChecker::do_delete_bitmap_inverted_check() {
    LOG(INFO) << fmt::format(
            "[delete bitmap checker] begin to do_delete_bitmap_inverted_check for instance_id={}",
            instance_id_);

    // number of delete bitmap keys being scanned
    int64_t total_delete_bitmap_keys {0};
    // number of delete bitmaps which belongs to non mow tablet
    int64_t abnormal_delete_bitmaps {0};
    // number of delete bitmaps which doesn't have corresponding rowset in MS
    int64_t leaked_delete_bitmaps {0};

    auto start_time = std::chrono::steady_clock::now();
    DORIS_CLOUD_DEFER {
        g_bvar_inverted_checker_leaked_delete_bitmaps.put(instance_id_, leaked_delete_bitmaps);
        g_bvar_inverted_checker_abnormal_delete_bitmaps.put(instance_id_, abnormal_delete_bitmaps);
        g_bvar_inverted_checker_delete_bitmaps_scanned.put(instance_id_, total_delete_bitmap_keys);

        auto cost = std::chrono::duration_cast<std::chrono::milliseconds>(
                            std::chrono::steady_clock::now() - start_time)
                            .count();
        if (leaked_delete_bitmaps > 0 || abnormal_delete_bitmaps > 0) {
            LOG(WARNING) << fmt::format(
                    "[delete bitmap check fails] delete bitmap inverted check for instance_id={}, "
                    "cost={} ms, total_delete_bitmap_keys={}, leaked_delete_bitmaps={}, "
                    "abnormal_delete_bitmaps={}",
                    instance_id_, cost, total_delete_bitmap_keys, leaked_delete_bitmaps,
                    abnormal_delete_bitmaps);
        } else {
            LOG(INFO) << fmt::format(
                    "[delete bitmap checker] delete bitmap inverted check for instance_id={}, "
                    "passed. cost={} ms, total_delete_bitmap_keys={}",
                    instance_id_, cost, total_delete_bitmap_keys);
        }
    };

    struct TabletsRowsetsCache {
        int64_t tablet_id {-1};
        bool enable_merge_on_write {false};
        std::unordered_set<std::string> rowsets {};
        std::unordered_set<std::string> pending_delete_bitmaps {};
    } tablet_rowsets_cache {};

    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_delete_bitmap_key({instance_id_, 0, "", 0, 0});
    auto end =
            meta_delete_bitmap_key({instance_id_, std::numeric_limits<int64_t>::max(), "", 0, 0});
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get rowset kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            std::string_view k1 = k;
            k1.remove_prefix(1);
            std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
            decode_key(&k1, &out);
            // 0x01 "meta" ${instance_id} "delete_bitmap" ${tablet_id} ${rowset_id} ${version} ${segment_id} -> roaringbitmap
            auto tablet_id = std::get<int64_t>(std::get<0>(out[3]));
            auto rowset_id = std::get<std::string>(std::get<0>(out[4]));
            auto version = std::get<std::int64_t>(std::get<0>(out[5]));
            auto segment_id = std::get<std::int64_t>(std::get<0>(out[6]));

            ++total_delete_bitmap_keys;

            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
            }

            if (tablet_rowsets_cache.tablet_id == -1 ||
                tablet_rowsets_cache.tablet_id != tablet_id) {
                TabletMetaCloudPB tablet_meta;
                int ret = get_tablet_meta(txn_kv_.get(), instance_id_, tablet_id, tablet_meta);
                if (ret < 0) {
                    LOG(WARNING) << fmt::format(
                            "[delete bitmap checker] failed to get_tablet_meta in "
                            "do_delete_bitmap_inverted_check(), instance_id={}, tablet_id={}",
                            instance_id_, tablet_id);
                    return ret;
                }

                tablet_rowsets_cache.tablet_id = tablet_id;
                tablet_rowsets_cache.enable_merge_on_write =
                        tablet_meta.enable_unique_key_merge_on_write();
                tablet_rowsets_cache.rowsets.clear();
                tablet_rowsets_cache.pending_delete_bitmaps.clear();

                if (tablet_rowsets_cache.enable_merge_on_write) {
                    // only collect rowsets for merge-on-write tablet
                    auto collect_cb =
                            [&tablet_rowsets_cache](const doris::RowsetMetaCloudPB& rowset) {
                                tablet_rowsets_cache.rowsets.insert(rowset.rowset_id_v2());
                            };
                    ret = collect_tablet_rowsets(tablet_id, collect_cb);
                    if (ret < 0) {
                        return ret;
                    }
                    // get pending delete bitmaps
                    ret = get_pending_delete_bitmap_keys(
                            tablet_id, tablet_rowsets_cache.pending_delete_bitmaps);
                    if (ret < 0) {
                        return ret;
                    }
                }
            }
            DCHECK_EQ(tablet_id, tablet_rowsets_cache.tablet_id);

            if (!tablet_rowsets_cache.enable_merge_on_write) {
                // clang-format off
                TEST_SYNC_POINT_CALLBACK(
                        "InstanceChecker::do_delete_bitmap_inverted_check.get_abnormal_delete_bitmap",
                        &tablet_id, &rowset_id, &version, &segment_id);
                // clang-format on
                ++abnormal_delete_bitmaps;
                // log an error and continue to check the next delete bitmap
                LOG(WARNING) << fmt::format(
                        "[delete bitmap check fails] find a delete bitmap belongs to tablet "
                        "which is not a merge-on-write table! instance_id={}, tablet_id={}, "
                        "version={}, segment_id={}",
                        instance_id_, tablet_id, version, segment_id);
                continue;
            }

            if (!tablet_rowsets_cache.rowsets.contains(rowset_id) &&
                !tablet_rowsets_cache.pending_delete_bitmaps.contains(std::string(k))) {
                TEST_SYNC_POINT_CALLBACK(
                        "InstanceChecker::do_delete_bitmap_inverted_check.get_leaked_delete_bitmap",
                        &tablet_id, &rowset_id, &version, &segment_id);
                ++leaked_delete_bitmaps;
                // log an error and continue to check the next delete bitmap
                LOG(WARNING) << fmt::format(
                        "[delete bitmap check fails] can't find corresponding rowset for delete "
                        "bitmap instance_id={}, tablet_id={}, rowset_id={}, version={}, "
                        "segment_id={}",
                        instance_id_, tablet_id, rowset_id, version, segment_id);
            }
        }
    }

    return (leaked_delete_bitmaps > 0 || abnormal_delete_bitmaps > 0) ? 1 : 0;
}

int InstanceChecker::get_pending_delete_bitmap_keys(
        int64_t tablet_id, std::unordered_set<std::string>& pending_delete_bitmaps) {
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to create txn";
        return -1;
    }
    std::string pending_key = meta_pending_delete_bitmap_key({instance_id_, tablet_id});
    std::string pending_val;
    err = txn->get(pending_key, &pending_val);
    if (err != TxnErrorCode::TXN_OK && err != TxnErrorCode::TXN_KEY_NOT_FOUND) {
        LOG(WARNING) << "failed to get pending delete bitmap kv, err=" << err;
        return -1;
    }
    if (err == TxnErrorCode::TXN_OK) {
        PendingDeleteBitmapPB pending_info;
        if (!pending_info.ParseFromString(pending_val)) [[unlikely]] {
            LOG(WARNING) << "failed to parse PendingDeleteBitmapPB, tablet=" << tablet_id;
            return -1;
        }
        for (auto& delete_bitmap_key : pending_info.delete_bitmap_keys()) {
            pending_delete_bitmaps.emplace(std::string(delete_bitmap_key));
        }
    }
    return 0;
}

int InstanceChecker::check_inverted_index_file_storage_format_v1(
        int64_t tablet_id, const std::string& file_path, const std::string& rowset_info,
        RowsetIndexesFormatV1& rowset_index_cache_v1) {
    // format v1: data/{tablet_id}/{rowset_id}_{seg_num}_{idx_id}{idx_suffix}.idx
    std::string rowset_id;
    int64_t segment_id;
    std::string index_id_with_suffix_name;
    // {rowset_id}_{seg_num}_{idx_id}{idx_suffix}.idx
    std::vector<std::string> str;
    butil::SplitString(rowset_info.substr(0, rowset_info.size() - 4), '_', &str);
    if (str.size() < 3) {
        LOG(WARNING) << "Split rowset info with '_' error, str size < 3, rowset_info = "
                     << rowset_info;
        return -1;
    }
    rowset_id = str[0];
    segment_id = std::atoll(str[1].c_str());
    index_id_with_suffix_name = str[2];

    if (rowset_index_cache_v1.rowset_id == rowset_id) {
        if (rowset_index_cache_v1.segment_ids.contains(segment_id)) {
            if (auto it = rowset_index_cache_v1.index_ids.find(index_id_with_suffix_name);
                it == rowset_index_cache_v1.index_ids.end()) {
                // clang-format off
                LOG(WARNING) << fmt::format("index_id with suffix name not found, rowset_info = {}, obj_key = {}", rowset_info, file_path);
                // clang-format on
                return -1;
            }
        } else {
            // clang-format off
            LOG(WARNING) << fmt::format("segment id not found, rowset_info = {}, obj_key = {}", rowset_info, file_path);
            // clang-format on
            return -1;
        }
    }

    rowset_index_cache_v1.rowset_id = rowset_id;
    rowset_index_cache_v1.segment_ids.clear();
    rowset_index_cache_v1.index_ids.clear();

    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to create txn";
        return -1;
    }
    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_rowset_key({instance_id_, tablet_id, 0});
    auto end = meta_rowset_key({instance_id_, tablet_id, INT64_MAX});
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        TxnErrorCode err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get rowset kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next()) {
            // recycle corresponding resources
            auto [k, v] = it->next();
            doris::RowsetMetaCloudPB rs_meta;
            if (!rs_meta.ParseFromArray(v.data(), v.size())) {
                LOG(WARNING) << "malformed rowset meta value, key=" << hex(k);
                return -1;
            }

            TabletIndexPB tablet_index;
            if (get_tablet_idx(txn_kv_.get(), instance_id_, rs_meta.tablet_id(), tablet_index) ==
                -1) {
                LOG(WARNING) << "failedt to get tablet index, tablet_id= " << rs_meta.tablet_id();
                return -1;
            }

            auto tablet_schema_key = meta_schema_key(
                    {instance_id_, tablet_index.index_id(), rs_meta.schema_version()});
            ValueBuf tablet_schema_val;
            err = cloud::blob_get(txn.get(), tablet_schema_key, &tablet_schema_val);

            if (err != TxnErrorCode::TXN_OK) {
                LOG(WARNING) << "failed to get schema, err=" << err;
                return -1;
            }

            auto* schema = rs_meta.mutable_tablet_schema();
            if (!parse_schema_value(tablet_schema_val, schema)) {
                LOG(WARNING) << "malformed schema value, key=" << hex(tablet_schema_key);
                return -1;
            }

            for (size_t i = 0; i < rs_meta.num_segments(); i++) {
                rowset_index_cache_v1.segment_ids.insert(i);
            }

            for (const auto& i : rs_meta.tablet_schema().index()) {
                if (i.has_index_type() && i.index_type() == IndexType::INVERTED) {
                    LOG(INFO) << fmt::format(
                            "record index info, index_id: {}, index_suffix_name: {}", i.index_id(),
                            i.index_suffix_name());
                    rowset_index_cache_v1.index_ids.insert(
                            fmt::format("{}{}", i.index_id(), i.index_suffix_name()));
                }
            }

            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
                break;
            }
        }
    }

    if (!rowset_index_cache_v1.segment_ids.contains(segment_id)) {
        // Garbage data leak
        // clang-format off
        LOG(WARNING) << "rowset_index_cache_v1.segment_ids don't contains segment_id, rowset should be recycled,"
                     << " key = " << file_path
                     << " segment_id = " << segment_id;
        // clang-format on
        return 1;
    }

    if (!rowset_index_cache_v1.index_ids.contains(index_id_with_suffix_name)) {
        // Garbage data leak
        // clang-format off
        LOG(WARNING) << "rowset_index_cache_v1.index_ids don't contains index_id_with_suffix_name,"
                     << " rowset with inde meta should be recycled, key=" << file_path
                     << " index_id_with_suffix_name=" << index_id_with_suffix_name;
        // clang-format on
        return 1;
    }

    return 0;
}

int InstanceChecker::check_inverted_index_file_storage_format_v2(
        int64_t tablet_id, const std::string& file_path, const std::string& rowset_info,
        RowsetIndexesFormatV2& rowset_index_cache_v2) {
    std::string rowset_id;
    int64_t segment_id;
    // {rowset_id}_{seg_num}.idx
    std::vector<std::string> str;
    butil::SplitString(rowset_info.substr(0, rowset_info.size() - 4), '_', &str);
    if (str.size() < 2) {
        // clang-format off
        LOG(WARNING) << "Split rowset info with '_' error, str size < 2, rowset_info = " << rowset_info;
        // clang-format on
        return -1;
    }
    rowset_id = str[0];
    segment_id = std::atoll(str[1].c_str());

    if (rowset_index_cache_v2.rowset_id == rowset_id) {
        if (!rowset_index_cache_v2.segment_ids.contains(segment_id)) {
            // clang-format off
            LOG(WARNING) << fmt::format("index file not found, rowset_info = {}, obj_key = {}", rowset_info, file_path);
            // clang-format on
            return -1;
        }
    }

    rowset_index_cache_v2.rowset_id = rowset_id;
    rowset_index_cache_v2.segment_ids.clear();

    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to create txn";
        return -1;
    }
    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_rowset_key({instance_id_, tablet_id, 0});
    auto end = meta_rowset_key({instance_id_, tablet_id, INT64_MAX});
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        TxnErrorCode err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get rowset kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next()) {
            // recycle corresponding resources
            auto [k, v] = it->next();
            doris::RowsetMetaCloudPB rs_meta;
            if (!rs_meta.ParseFromArray(v.data(), v.size())) {
                LOG(WARNING) << "malformed rowset meta value, key=" << hex(k);
                return -1;
            }

            for (size_t i = 0; i < rs_meta.num_segments(); i++) {
                rowset_index_cache_v2.segment_ids.insert(i);
            }

            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
                break;
            }
        }
    }

    if (!rowset_index_cache_v2.segment_ids.contains(segment_id)) {
        // Garbage data leak
        LOG(WARNING) << "rowset with index meta should be recycled, key=" << file_path;
        return 1;
    }

    return 0;
}

int InstanceChecker::check_delete_bitmap_storage_optimize_v2(
        int64_t tablet_id, bool has_sequence_col,
        int64_t& rowsets_with_useless_delete_bitmap_version) {
    // end_version: create_time
    std::map<int64_t, int64_t> tablet_rowsets_map {};
    // rowset_id: {start_version, end_version}
    std::map<std::string, std::pair<int64_t, int64_t>> rowset_version_map;
    // Get all visible rowsets of this tablet
    auto collect_cb = [&](const doris::RowsetMetaCloudPB& rowset) {
        if (rowset.start_version() == 0 && rowset.end_version() == 1) {
            // ignore dummy rowset [0-1]
            return;
        }
        tablet_rowsets_map[rowset.end_version()] = rowset.creation_time();
        rowset_version_map[rowset.rowset_id_v2()] =
                std::make_pair(rowset.start_version(), rowset.end_version());
    };
    if (int ret = collect_tablet_rowsets(tablet_id, collect_cb); ret != 0) {
        return ret;
    }

    std::unordered_set<std::string> pending_delete_bitmaps;
    if (auto ret = get_pending_delete_bitmap_keys(tablet_id, pending_delete_bitmaps); ret < 0) {
        return ret;
    }

    std::unique_ptr<RangeGetIterator> it;
    auto begin = meta_delete_bitmap_key({instance_id_, tablet_id, "", 0, 0});
    auto end = meta_delete_bitmap_key({instance_id_, tablet_id + 1, "", 0, 0});
    std::string last_rowset_id = "";
    int64_t last_version = 0;
    int64_t last_failed_version = 0;
    std::vector<int64_t> failed_versions;
    auto print_failed_versions = [&]() {
        TEST_SYNC_POINT_CALLBACK(
                "InstanceChecker::check_delete_bitmap_storage_optimize_v2.get_abnormal_"
                "rowset",
                &tablet_id, &last_rowset_id);
        rowsets_with_useless_delete_bitmap_version++;
        // some versions are continuous, such as [8, 9, 10, 11, 13, 17, 18]
        // print as [8-11, 13, 17-18]
        int64_t last_start_version = -1;
        int64_t last_end_version = -1;
        std::stringstream ss;
        ss << "[";
        for (int64_t version : failed_versions) {
            if (last_start_version == -1) {
                last_start_version = version;
                last_end_version = version;
                continue;
            }
            if (last_end_version + 1 == version) {
                last_end_version = version;
            } else {
                if (last_start_version == last_end_version) {
                    ss << last_start_version << ", ";
                } else {
                    ss << last_start_version << "-" << last_end_version << ", ";
                }
                last_start_version = version;
                last_end_version = version;
            }
        }
        if (last_start_version == last_end_version) {
            ss << last_start_version;
        } else {
            ss << last_start_version << "-" << last_end_version;
        }
        ss << "]";
        std::stringstream version_str;
        auto it = rowset_version_map.find(last_rowset_id);
        if (it != rowset_version_map.end()) {
            version_str << "[" << it->second.first << "-" << it->second.second << "]";
        }
        LOG(WARNING) << fmt::format(
                "[delete bitmap check fails] delete bitmap storage optimize v2 check fail "
                "for instance_id={}, tablet_id={}, rowset_id={}, version={} found delete "
                "bitmap with versions={}, size={}",
                instance_id_, tablet_id, last_rowset_id, version_str.str(), ss.str(),
                failed_versions.size());
    };
    using namespace std::chrono;
    int64_t now = duration_cast<seconds>(system_clock::now().time_since_epoch()).count();
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get delete bitmap kv, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }
        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            std::string_view k1 = k;
            k1.remove_prefix(1);
            std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
            decode_key(&k1, &out);
            // 0x01 "meta" ${instance_id} "delete_bitmap" ${tablet_id} ${rowset_id} ${version} ${segment_id} -> roaringbitmap
            auto rowset_id = std::get<std::string>(std::get<0>(out[4]));
            auto version = std::get<std::int64_t>(std::get<0>(out[5]));
            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
            }
            if (rowset_id == last_rowset_id && version == last_version) {
                // skip the same rowset and version
                continue;
            }
            if (rowset_id != last_rowset_id && !failed_versions.empty()) {
                print_failed_versions();
                last_failed_version = 0;
                failed_versions.clear();
            }
            last_rowset_id = rowset_id;
            last_version = version;
            if (tablet_rowsets_map.find(version) != tablet_rowsets_map.end()) {
                continue;
            }
            auto version_it = rowset_version_map.find(rowset_id);
            if (version_it == rowset_version_map.end()) {
                // checked in do_delete_bitmap_inverted_check
                continue;
            }
            if (pending_delete_bitmaps.contains(std::string(k))) {
                continue;
            }
            if (has_sequence_col && version >= version_it->second.first &&
                version <= version_it->second.second) {
                continue;
            }
            // there may be an interval in this situation:
            // 1. finish compaction job; 2. checker; 3. finish agg and remove delete bitmap to ms
            auto rowset_it = tablet_rowsets_map.upper_bound(version);
            if (rowset_it == tablet_rowsets_map.end()) {
                if (version != last_failed_version) {
                    failed_versions.push_back(version);
                }
                last_failed_version = version;
                continue;
            }
            if (rowset_it->second + config::delete_bitmap_storage_optimize_v2_check_skip_seconds >=
                now) {
                continue;
            }
            if (version != last_failed_version) {
                failed_versions.push_back(version);
            }
            last_failed_version = version;
        }
    }
    if (!failed_versions.empty()) {
        print_failed_versions();
    }
    LOG(INFO) << fmt::format(
            "[delete bitmap checker] finish check delete bitmap storage optimize v2 for "
            "instance_id={}, tablet_id={}, rowsets_num={}, "
            "rowsets_with_useless_delete_bitmap_version={}",
            instance_id_, tablet_id, tablet_rowsets_map.size(),
            rowsets_with_useless_delete_bitmap_version);
    return (rowsets_with_useless_delete_bitmap_version > 1 ? 1 : 0);
}

int InstanceChecker::do_delete_bitmap_storage_optimize_check(int version) {
    if (version != 2) {
        return -1;
    }
    int64_t total_tablets_num {0};
    int64_t failed_tablets_num {0};

    // for v2 check
    int64_t max_rowsets_with_useless_delete_bitmap_version = 0;
    int64_t tablet_id_with_max_rowsets_with_useless_delete_bitmap_version = 0;

    // check that for every visible rowset, there exists at least delete one bitmap in MS
    int ret = traverse_mow_tablet([&](int64_t tablet_id, bool has_sequence_col) {
        ++total_tablets_num;
        int64_t rowsets_with_useless_delete_bitmap_version = 0;
        int res = check_delete_bitmap_storage_optimize_v2(
                tablet_id, has_sequence_col, rowsets_with_useless_delete_bitmap_version);
        if (rowsets_with_useless_delete_bitmap_version >
            max_rowsets_with_useless_delete_bitmap_version) {
            max_rowsets_with_useless_delete_bitmap_version =
                    rowsets_with_useless_delete_bitmap_version;
            tablet_id_with_max_rowsets_with_useless_delete_bitmap_version = tablet_id;
        }
        failed_tablets_num += (res != 0);
        return res;
    });

    if (ret < 0) {
        return ret;
    }

    g_bvar_max_rowsets_with_useless_delete_bitmap_version.put(
            instance_id_, max_rowsets_with_useless_delete_bitmap_version);

    std::stringstream ss;
    ss << "[delete bitmap checker] check delete bitmap storage optimize v" << version
       << " for instance_id=" << instance_id_ << ", total_tablets_num=" << total_tablets_num
       << ", failed_tablets_num=" << failed_tablets_num
       << ". max_rowsets_with_useless_delete_bitmap_version="
       << max_rowsets_with_useless_delete_bitmap_version
       << ", tablet_id=" << tablet_id_with_max_rowsets_with_useless_delete_bitmap_version;
    LOG(INFO) << ss.str();

    return (failed_tablets_num > 0) ? 1 : 0;
}

int InstanceChecker::do_mow_job_key_check() {
    std::unique_ptr<RangeGetIterator> it;
    std::string begin = mow_tablet_job_key({instance_id_, 0, 0});
    std::string end = mow_tablet_job_key({instance_id_, INT64_MAX, 0});
    MowTabletJobPB mow_tablet_job;
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get mow tablet job key, err=" << err;
            return -1;
        }
        int64_t now = duration_cast<std::chrono::seconds>(
                              std::chrono::system_clock::now().time_since_epoch())
                              .count();
        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();
            std::string_view k1 = k;
            k1.remove_prefix(1);
            std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
            decode_key(&k1, &out);
            // 0x01 "meta" ${instance_id} "mow_tablet_job" ${table_id} ${initiator}
            auto table_id = std::get<int64_t>(std::get<0>(out[3]));
            auto initiator = std::get<int64_t>(std::get<0>(out[4]));
            if (!mow_tablet_job.ParseFromArray(v.data(), v.size())) [[unlikely]] {
                LOG(WARNING) << "failed to parse MowTabletJobPB";
                return -1;
            }
            int64_t expiration = mow_tablet_job.expiration();
            // check job key failed should meet both following two condition:
            // 1. job key is expired
            // 2. table lock key is not found or key is not expired
            if (expiration < now - config::mow_job_key_check_expiration_diff_seconds) {
                std::string lock_key =
                        meta_delete_bitmap_update_lock_key({instance_id_, table_id, -1});
                std::string lock_val;
                err = txn->get(lock_key, &lock_val);
                std::string reason = "";
                if (err == TxnErrorCode::TXN_KEY_NOT_FOUND) {
                    reason = "table lock key not found";

                } else {
                    DeleteBitmapUpdateLockPB lock_info;
                    if (!lock_info.ParseFromString(lock_val)) [[unlikely]] {
                        LOG(WARNING) << "failed to parse DeleteBitmapUpdateLockPB";
                        return -1;
                    }
                    if (lock_info.expiration() > now || lock_info.lock_id() != -1) {
                        reason = "table lock is not expired,lock_id=" +
                                 std::to_string(lock_info.lock_id());
                    }
                }
                if (reason != "") {
                    LOG(WARNING) << fmt::format(
                            "[compaction key check fails] mow job key check fail for "
                            "instance_id={}, table_id={}, initiator={}, expiration={}, now={}, "
                            "reason={}",
                            instance_id_, table_id, initiator, expiration, now, reason);
                    return -1;
                }
            }
        }
        begin = it->next_begin_key(); // Update to next smallest key for iteration
    }
    return 0;
}
int InstanceChecker::do_tablet_stats_key_check() {
    int ret = 0;

    int64_t nums_leak = 0;
    int64_t nums_loss = 0;
    int64_t nums_scanned = 0;
    int64_t nums_abnormal = 0;

    std::string begin = meta_tablet_key({instance_id_, 0, 0, 0, 0});
    std::string end = meta_tablet_key({instance_id_, INT64_MAX, 0, 0, 0});
    // inverted check tablet exists
    LOG(INFO) << "begin inverted check stats_tablet_key";
    ret = scan_and_handle_kv(begin, end, [&](std::string_view key, std::string_view value) {
        int ret = check_stats_tablet_key_exists(key, value);
        nums_scanned++;
        if (ret == 1) {
            nums_loss++;
        }
        return ret;
    });
    if (ret == -1) {
        LOG(WARNING) << "failed to inverted check if stats tablet key exists";
        return -1;
    } else if (ret == 1) {
        LOG(WARNING) << "stats_tablet_key loss, nums_scanned=" << nums_scanned
                     << ", nums_loss=" << nums_loss;
        return 1;
    }
    LOG(INFO) << "finish inverted check stats_tablet_key, nums_scanned=" << nums_scanned
              << ", nums_loss=" << nums_loss;

    begin = stats_tablet_key({instance_id_, 0, 0, 0, 0});
    end = stats_tablet_key({instance_id_, INT64_MAX, 0, 0, 0});
    nums_scanned = 0;
    // check tablet exists
    LOG(INFO) << "begin check stats_tablet_key leaked";
    ret = scan_and_handle_kv(begin, end, [&](std::string_view key, std::string_view value) {
        int ret = check_stats_tablet_key_leaked(key, value);
        nums_scanned++;
        if (ret == 1) {
            nums_leak++;
        }
        return ret;
    });
    if (ret == -1) {
        LOG(WARNING) << "failed to check if stats tablet key exists";
        return -1;
    } else if (ret == 1) {
        LOG(WARNING) << "stats_tablet_key leaked, nums_scanned=" << nums_scanned
                     << ", nums_leak=" << nums_leak;
        return 1;
    }
    LOG(INFO) << "finish check stats_tablet_key leaked, nums_scanned=" << nums_scanned
              << ", nums_leak=" << nums_leak;

    begin = stats_tablet_key({instance_id_, 0, 0, 0, 0});
    end = stats_tablet_key({instance_id_, INT64_MAX, 0, 0, 0});
    nums_scanned = 0;
    // check if key is normal
    LOG(INFO) << "begin check stats_tablet_key abnormal";
    ret = scan_and_handle_kv(begin, end, [&](std::string_view key, std::string_view value) {
        int ret = check_stats_tablet_key(key, value);
        nums_scanned++;
        if (ret == 1) {
            nums_abnormal++;
        }
        return ret;
    });
    if (ret == -1) {
        LOG(WARNING) << "failed to check if stats tablet key exists";
        return -1;
    } else if (ret == 1) {
        LOG(WARNING) << "stats_tablet_key abnormal, nums_scanned=" << nums_scanned
                     << ", nums_abnormal=" << nums_abnormal;
        return 1;
    }
    LOG(INFO) << "finish check stats_tablet_key, nums_scanned=" << nums_scanned
              << ", nums_abnormal=" << nums_abnormal;
    return 0;
}

int InstanceChecker::check_stats_tablet_key_exists(std::string_view key, std::string_view value) {
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "meta" ${instance_id} "tablet" ${table_id} ${index_id} ${partition_id} ${tablet_id}
    auto table_id = std::get<int64_t>(std::get<0>(out[3]));
    auto index_id = std::get<int64_t>(std::get<0>(out[4]));
    auto partition_id = std::get<int64_t>(std::get<0>(out[5]));
    auto tablet_id = std::get<int64_t>(std::get<0>(out[6]));
    std::string tablet_stats_key =
            stats_tablet_key({instance_id_, table_id, index_id, partition_id, tablet_id});
    int ret = key_exist(txn_kv_.get(), tablet_stats_key);
    if (ret == 1) {
        // clang-format off
        LOG(WARNING) << "stats tablet key's tablet key loss,"
                    << " stats tablet key=" << hex(tablet_stats_key)
                    << " meta tablet key=" << hex(key);
        // clang-format on
        return 1;
    } else if (ret == -1) {
        LOG(WARNING) << "failed to check key exists, key=" << hex(tablet_stats_key);
        return -1;
    }
    LOG(INFO) << "check stats_tablet_key_exists ok, key=" << hex(key);
    return 0;
}

int InstanceChecker::check_stats_tablet_key_leaked(std::string_view key, std::string_view value) {
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "stats" ${instance_id} "tablet" ${table_id} ${index_id} ${partition_id} ${tablet_id}
    auto table_id = std::get<int64_t>(std::get<0>(out[3]));
    auto index_id = std::get<int64_t>(std::get<0>(out[4]));
    auto partition_id = std::get<int64_t>(std::get<0>(out[5]));
    auto tablet_id = std::get<int64_t>(std::get<0>(out[6]));
    std::string tablet_key =
            meta_tablet_key({instance_id_, table_id, index_id, partition_id, tablet_id});
    int ret = key_exist(txn_kv_.get(), tablet_key);
    if (ret == 1) {
        // clang-format off
        LOG(WARNING) << "stats tablet key's tablet key leak,"
                    << " stats tablet key=" << hex(key)
                    << " meta tablet key=" << hex(tablet_key);
        // clang-format on
        return 1;
    } else if (ret == -1) {
        LOG(WARNING) << "failed to check key exists, key=" << hex(tablet_key);
        return -1;
    }
    LOG(INFO) << "check stats_tablet_key_leaked ok, key=" << hex(key);
    return 0;
}

int InstanceChecker::check_stats_tablet_key(std::string_view key, std::string_view value) {
    TabletStatsPB tablet_stats_pb;
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "stats" ${instance_id} "tablet" ${table_id} ${index_id} ${partition_id} ${tablet_id}
    auto tablet_id = std::get<int64_t>(std::get<0>(out[6]));
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG_WARNING("failed to recycle tablet ")
                .tag("tablet id", tablet_id)
                .tag("instance_id", instance_id_)
                .tag("reason", "failed to create txn");
        return -1;
    }
    std::string tablet_idx_key = meta_tablet_idx_key({instance_id_, tablet_id});
    std::string tablet_idx_val;
    TabletIndexPB tablet_idx;
    err = txn->get(tablet_idx_key, &tablet_idx_val);
    if (err != TxnErrorCode::TXN_OK) {
        // clang-format off
        LOG(WARNING) << "failed to get tablet index key,"
                        << " key=" << hex(tablet_idx_key)
                        << " code=" << err;
        // clang-format on
        return -1;
    }
    tablet_idx.ParseFromString(tablet_idx_val);
    MetaServiceCode code = MetaServiceCode::OK;
    std::string msg;
    internal_get_tablet_stats(code, msg, txn.get(), instance_id_, tablet_idx, tablet_stats_pb);
    if (code != MetaServiceCode::OK) {
        // clang-format off
        LOG(WARNING) << "failed to get tablet stats,"
                        << " code=" << code 
                        << " msg=" << msg;
        // clang-format on
        return -1;
    }

    GetRowsetResponse resp;
    // get rowsets in tablet
    internal_get_rowset(txn.get(), 0, std::numeric_limits<int64_t>::max() - 1, instance_id_,
                        tablet_id, code, msg, &resp);
    if (code != MetaServiceCode::OK) {
        LOG_WARNING("failed to get rowsets of tablet when check stats tablet key")
                .tag("tablet id", tablet_id)
                .tag("msg", msg)
                .tag("code", code)
                .tag("instance id", instance_id_);
        return -1;
    }
    int64_t num_rows = 0;
    int64_t num_rowsets = 0;
    int64_t num_segments = 0;
    int64_t total_data_size = 0;
    for (const auto& rs_meta : resp.rowset_meta()) {
        num_rows += rs_meta.num_rows();
        num_rowsets++;
        num_segments += rs_meta.num_segments();
        total_data_size += rs_meta.total_disk_size();
    }
    int ret = 0;
    if (tablet_stats_pb.data_size() != total_data_size) {
        ret = 1;
        // clang-format off
        LOG(WARNING) << " tablet_stats_pb's data size is not same with all rowset total data size,"
                        << " tablet_stats_pb's data size=" << tablet_stats_pb.data_size()
                        << " all rowset total data size=" << total_data_size
                        << " stats tablet meta=" << tablet_stats_pb.ShortDebugString();
        // clang-format on
    } else if (tablet_stats_pb.num_rows() != num_rows) {
        ret = 1;
        // clang-format off
        LOG(WARNING) << " tablet_stats_pb's num_rows is not same with all rowset total num_rows,"
                        << " tablet_stats_pb's num_rows=" << tablet_stats_pb.num_rows()
                        << " all rowset total num_rows=" << num_rows
                        << " stats tablet meta=" << tablet_stats_pb.ShortDebugString();
        // clang-format on
    } else if (tablet_stats_pb.num_rowsets() != num_rowsets) {
        ret = 1;
        // clang-format off
        LOG(WARNING) << " tablet_stats_pb's num_rowsets is not same with all rowset nums,"
                        << " tablet_stats_pb's num_rowsets=" << tablet_stats_pb.num_rowsets()
                        << " all rowset nums=" << num_rowsets
                        << " stats tablet meta=" << tablet_stats_pb.ShortDebugString();
        // clang-format on
    } else if (tablet_stats_pb.num_segments() != num_segments) {
        ret = 1;
        // clang-format off
        LOG(WARNING) << " tablet_stats_pb's num_segments is not same with all rowset total num_segments,"
                        << " tablet_stats_pb's num_segments=" << tablet_stats_pb.num_segments()
                        << " all rowset total num_segments=" << num_segments
                        << " stats tablet meta=" << tablet_stats_pb.ShortDebugString();
        // clang-format on
    }

    return ret;
}

int InstanceChecker::scan_and_handle_kv(
        std::string& start_key, const std::string& end_key,
        std::function<int(std::string_view, std::string_view)> handle_kv) {
    std::unique_ptr<Transaction> txn;
    int ret = 0;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to init txn";
        return -1;
    }
    std::unique_ptr<RangeGetIterator> it;
    int limit = 10000;
    TEST_SYNC_POINT_CALLBACK("InstanceChecker:scan_and_handle_kv:limit", &limit);
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        err = txn->get(start_key, end_key, &it, false, limit);
        TEST_SYNC_POINT_CALLBACK("InstanceChecker:scan_and_handle_kv:get_err", &err);
        if (err == TxnErrorCode::TXN_TOO_OLD) {
            LOG(WARNING) << "failed to get range kv, err=txn too old, "
                         << " now fallback to non snapshot scan";
            err = txn_kv_->create_txn(&txn);
            if (err == TxnErrorCode::TXN_OK) {
                err = txn->get(start_key, end_key, &it);
            }
        }
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "internal error, failed to get range kv, err=" << err;
            return -1;
        }

        while (it->has_next() && !stopped()) {
            auto [k, v] = it->next();

            int handle_ret = handle_kv(k, v);
            if (handle_ret == -1) {
                return -1;
            } else {
                ret = std::max(ret, handle_ret);
            }
            if (!it->has_next()) {
                start_key = k;
            }
        }
        start_key = it->next_begin_key();
    }
    return ret;
}

int InstanceChecker::do_version_key_check() {
    std::unique_ptr<RangeGetIterator> table_it;
    std::string begin = table_version_key({instance_id_, 0, 0});
    std::string end = table_version_key({instance_id_, INT64_MAX, 0});
    bool check_res = true;
    while (table_it == nullptr /* may be not init */ || (table_it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &table_it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get mow tablet job key, err=" << err;
            return -1;
        }
        while (table_it->has_next() && !stopped()) {
            auto [k, v] = table_it->next();
            std::string_view k1 = k;
            k1.remove_prefix(1);
            std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
            decode_key(&k1, &out);
            int64_t table_version = -1;
            // 0x01 "version" ${instance_id} "table" ${db_id} ${tbl_id}
            if (!txn->decode_atomic_int(v, &table_version)) {
                LOG(WARNING) << "malformed table version value";
                return -1;
            }
            auto table_id = std::get<int64_t>(std::get<0>(out[4]));
            auto db_id = std::get<int64_t>(std::get<0>(out[3]));
            std::string partition_version_key_begin =
                    partition_version_key({instance_id_, db_id, table_id, 0});
            std::string partition_version_key_end =
                    partition_version_key({instance_id_, db_id, table_id, INT64_MAX});
            VersionPB partition_version_pb;

            std::unique_ptr<RangeGetIterator> part_it;
            while (part_it == nullptr /* may be not init */ || (part_it->more() && !stopped())) {
                std::unique_ptr<Transaction> txn;
                TxnErrorCode err = txn_kv_->create_txn(&txn);
                if (err != TxnErrorCode::TXN_OK) {
                    LOG(WARNING) << "failed to create txn";
                    return -1;
                }
                err = txn->get(partition_version_key_begin, partition_version_key_end, &part_it);
                if (err != TxnErrorCode::TXN_OK) {
                    LOG(WARNING) << "failed to get mow tablet job key, err=" << err;
                    return -1;
                }
                while (part_it->has_next() && !stopped()) {
                    auto [k, v] = part_it->next();
                    // 0x01 "version" ${instance_id} "partition" ${db_id} ${tbl_id} ${partition_id}
                    std::string_view k1 = k;
                    k1.remove_prefix(1);
                    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
                    decode_key(&k1, &out);
                    if (!partition_version_pb.ParseFromArray(v.data(), v.size())) [[unlikely]] {
                        LOG(WARNING) << "failed to parse partition VersionPB";
                        return -1;
                    }
                    auto partition_id = std::get<int64_t>(std::get<0>(out[5]));
                    int64_t partition_version = partition_version_pb.version();
                    if (table_version < partition_version) {
                        check_res = false;
                        LOG(WARNING)
                                << "table version is less than partition version,"
                                << " table_id: " << table_id << "tablet_version: " << table_version
                                << " partition_id: " << partition_id
                                << " partition_version: " << partition_version;
                    }
                }
                partition_version_key_begin = part_it->next_begin_key();
            }
        }
        begin = table_it->next_begin_key(); // Update to next smallest key for iteration
    }
    return check_res ? 0 : -1;
}

int InstanceChecker::do_restore_job_check() {
    int64_t num_prepared = 0;
    int64_t num_committed = 0;
    int64_t num_dropped = 0;
    int64_t num_completed = 0;
    int64_t num_recycling = 0;
    int64_t num_cost_many_time = 0;
    const int64_t COST_MANY_THRESHOLD = 3600;

    using namespace std::chrono;
    auto start_time = steady_clock::now();
    DORIS_CLOUD_DEFER {
        g_bvar_checker_restore_job_prepared_state.put(instance_id_, num_prepared);
        g_bvar_checker_restore_job_committed_state.put(instance_id_, num_committed);
        g_bvar_checker_restore_job_dropped_state.put(instance_id_, num_dropped);
        g_bvar_checker_restore_job_completed_state.put(instance_id_, num_completed);
        g_bvar_checker_restore_job_recycling_state.put(instance_id_, num_recycling);
        g_bvar_checker_restore_job_cost_many_time.put(instance_id_, num_cost_many_time);
        auto cost_ms =
                duration_cast<std::chrono::milliseconds>(steady_clock::now() - start_time).count();
        LOG(INFO) << "check instance restore jobs finished, cost=" << cost_ms
                  << "ms. instance_id=" << instance_id_ << " num_prepared=" << num_prepared
                  << " num_committed=" << num_committed << " num_dropped=" << num_dropped
                  << " num_completed=" << num_completed << " num_recycling=" << num_recycling
                  << " num_cost_many_time=" << num_cost_many_time;
    };

    LOG_INFO("begin to check restore jobs").tag("instance_id", instance_id_);

    JobRestoreTabletKeyInfo restore_job_key_info0 {instance_id_, 0};
    JobRestoreTabletKeyInfo restore_job_key_info1 {instance_id_, INT64_MAX};
    std::string begin;
    std::string end;
    job_restore_tablet_key(restore_job_key_info0, &begin);
    job_restore_tablet_key(restore_job_key_info1, &end);
    std::unique_ptr<RangeGetIterator> it;
    while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn";
            return -1;
        }
        err = txn->get(begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to get mow tablet job key, err=" << err;
            return -1;
        }

        if (!it->has_next()) {
            break;
        }
        while (it->has_next()) {
            auto [k, v] = it->next();
            RestoreJobCloudPB restore_job_pb;
            if (!restore_job_pb.ParseFromArray(v.data(), v.size())) {
                LOG_WARNING("malformed restore job value").tag("key", hex(k));
                return -1;
            }

            switch (restore_job_pb.state()) {
            case RestoreJobCloudPB::PREPARED:
                ++num_prepared;
                break;
            case RestoreJobCloudPB::COMMITTED:
                ++num_committed;
                break;
            case RestoreJobCloudPB::DROPPED:
                ++num_dropped;
                break;
            case RestoreJobCloudPB::COMPLETED:
                ++num_completed;
                break;
            case RestoreJobCloudPB::RECYCLING:
                ++num_recycling;
                break;
            default:
                break;
            }

            int64_t current_time = ::time(nullptr);
            if ((restore_job_pb.state() == RestoreJobCloudPB::PREPARED ||
                 restore_job_pb.state() == RestoreJobCloudPB::COMMITTED) &&
                current_time > restore_job_pb.ctime_s() + COST_MANY_THRESHOLD) {
                // restore job run more than 1 hour
                ++num_cost_many_time;
                LOG_WARNING("restore job cost too many time")
                        .tag("key", hex(k))
                        .tag("tablet_id", restore_job_pb.tablet_id())
                        .tag("state", restore_job_pb.state())
                        .tag("ctime_s", restore_job_pb.ctime_s())
                        .tag("mtime_s", restore_job_pb.mtime_s());
            }

            if (!it->has_next()) {
                begin = k;
                begin.push_back('\x00'); // Update to next smallest key for iteration
                break;
            }
        }
    }
    return 0;
}

int InstanceChecker::check_txn_info_key(std::string_view key, std::string_view value) {
    std::unordered_map<int64_t, std::string> txn_info_;
    TxnLabelPB txn_label_pb;

    auto handle_check_txn_label_key = [&](std::string_view key, std::string_view value) -> int {
        TxnInfoPB txn_info_pb;
        std::string_view k1 = key;
        k1.remove_prefix(1);
        std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
        decode_key(&k1, &out);
        // 0x01 "txn" ${instance_id} "txn_info" ${db_id} ${txn_id}
        if (!txn_info_pb.ParseFromArray(value.data(), value.size())) {
            LOG(WARNING) << "failed to parse TxnInfoPB";
            return -1;
        }
        auto txn_id = std::get<int64_t>(std::get<0>(out[4]));
        auto it = txn_info_.find(txn_id);
        if (it == txn_info_.end()) {
            return 0;
        } else {
            if (it->second != txn_info_pb.label()) {
                LOG(WARNING) << "txn_info_pb's txn_label not same with txn_label_pb's txn_label,"
                             << " txn_info_pb's txn_label: " << txn_info_pb.label()
                             << " txn_label_pb meta: " << txn_label_pb.ShortDebugString();
                return 1;
            }
        }
        return 0;
    };
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "txn" ${instance_id} "txn_label" ${db_id} ${label}
    if (!txn_label_pb.ParseFromArray(value.data(), value.size() - VERSION_STAMP_LEN)) {
        LOG(WARNING) << "failed to parse TxnLabelPB";
        return -1;
    }
    auto db_id = std::get<int64_t>(std::get<0>(out[3]));
    auto label = std::get<std::string>(std::get<0>(out[4]));
    // txn_id -> txn_label
    for (const auto& txn_id : txn_label_pb.txn_ids()) {
        txn_info_.insert({txn_id, label});
    }
    std::string txn_info_key_begin = txn_info_key({instance_id_, db_id, 0});
    std::string txn_info_key_end = txn_info_key({instance_id_, db_id, INT64_MAX});
    return scan_and_handle_kv(txn_info_key_begin, txn_info_key_end,
                              [&](std::string_view k, std::string_view v) -> int {
                                  return handle_check_txn_label_key(k, v);
                              });
}

int InstanceChecker::check_txn_label_key(std::string_view key, std::string_view value) {
    TxnInfoPB txn_info_pb;
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "txn" ${instance_id} "txn_info" ${db_id} ${txn_id}
    if (!txn_info_pb.ParseFromArray(value.data(), value.size())) {
        LOG(WARNING) << "failed to parse TxnInfoPB";
        return -1;
    }
    auto txn_id = std::get<int64_t>(std::get<0>(out[4]));
    auto db_id = std::get<int64_t>(std::get<0>(out[3]));
    auto label = txn_info_pb.label();
    std::string txn_label = txn_label_key({instance_id_, db_id, label});
    std::string txn_label_val;
    TxnLabelPB txn_label_pb;
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to init txn";
        return -1;
    }
    if (txn->get(txn_label, &txn_label_val) != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to get txn label key, key=" << hex(txn_label);
        return -1;
    }
    txn_label_pb.ParseFromString(txn_label_val);
    auto txn_ids = txn_label_pb.txn_ids();
    if (!std::count(txn_ids.begin(), txn_ids.end(), txn_id)) {
        // clang-format off txn_info_pb
        LOG(WARNING) << "txn_info_pb's txn_id not found in txn_label_pb info,"
                     << " txn_id: " << txn_id
                     << " txn_label_pb meta: " << txn_label_pb.ShortDebugString();
        // clang-format on
        return 1;
    }
    return 0;
}

int InstanceChecker::check_txn_index_key(std::string_view key, std::string_view value) {
    TxnInfoPB txn_info_pb;
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "txn" ${instance_id} "txn_info" ${db_id} ${txn_id}
    if (!txn_info_pb.ParseFromArray(value.data(), value.size())) {
        LOG(WARNING) << "failed to parse TxnInfoPB";
        return -1;
    }
    auto txn_id = std::get<int64_t>(std::get<0>(out[4]));
    auto db_id = std::get<int64_t>(std::get<0>(out[3]));
    /// get tablet id
    std::string txn_index = txn_index_key({instance_id_, txn_id});
    std::string txn_index_val;
    TxnIndexPB txn_index_pb;
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to init txn";
        return -1;
    }
    if (txn->get(txn_index, &txn_index_val) != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to get txn label key, key=" << hex(txn_index);
        return -1;
    }
    txn_index_pb.ParseFromString(txn_index_val);
    if (txn_index_pb.tablet_index().db_id() != db_id) {
        // clang-format off txn_info_pb
        LOG(WARNING) << "txn_index_pb's db_id not same with txn_info_pb's db_id,"
                     << " txn_index_pb meta: " << txn_index_pb.ShortDebugString()
                     << " txn_info_pb meta: " << txn_info_pb.ShortDebugString();
        // clang-format on
        return 1;
    }
    return 0;
}

int InstanceChecker::check_txn_running_key(std::string_view key, std::string_view value) {
    TxnRunningPB txn_running_pb;
    int64_t current_time =
            duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
    if (!txn_running_pb.ParseFromArray(value.data(), value.size())) {
        LOG(WARNING) << "failed to parse TxnRunningPB";
        return -1;
    }
    if (txn_running_pb.timeout_time() <= current_time) {
        LOG(WARNING) << "txn_running_pb.timeout_time() is less than current_time,"
                     << " but txn_running_key exists, "
                     << " txn_running_pb meta: " << txn_running_pb.ShortDebugString();
        return 1;
    }
    return 0;
}

int InstanceChecker::do_txn_key_check() {
    int ret = 0;

    // check txn info key depend on txn label key
    std::string begin = txn_label_key({instance_id_, 0, ""});
    std::string end = txn_label_key({instance_id_, INT64_MAX, ""});
    int64_t num_scanned = 0;
    int64_t num_abnormal = 0;
    LOG(INFO) << "begin check txn_label_key and txn_info_key";
    ret = scan_and_handle_kv(begin, end, [&, this](std::string_view k, std::string_view v) -> int {
        num_scanned++;
        int ret = check_txn_info_key(k, v);
        if (ret == 1) {
            num_abnormal++;
        }
        return ret;
    });

    if (ret == 1) {
        LOG(WARNING) << "failed to check txn_info_key depending on txn_label_key, num_scanned="
                     << num_scanned << ", num_abnormal=" << num_abnormal;
        return 1;
    } else if (ret == -1) {
        LOG(WARNING) << "failed to check txn label key and txn info key";
        return -1;
    }

    // check txn label key depend on txn info key
    begin = txn_info_key({instance_id_, 0, 0});
    end = txn_info_key({instance_id_, INT64_MAX, 0});
    num_scanned = 0;
    num_abnormal = 0;
    LOG(INFO) << "begin check txn_label_key and txn_info_key";
    ret = scan_and_handle_kv(begin, end, [&, this](std::string_view k, std::string_view v) -> int {
        num_scanned++;
        int ret = check_txn_label_key(k, v);
        if (ret == 1) {
            num_abnormal++;
        }
        return ret;
    });
    if (ret == 1) {
        LOG(WARNING) << "failed to check txn_label_key depending on txn_info_key, num_scanned="
                     << num_scanned << ", num_abnormal=" << num_abnormal;
        return 1;
    } else if (ret == -1) {
        LOG(WARNING) << "failed to inverted check txn label key and txn info key";
        return -1;
    }
    LOG(INFO) << "finish check txn_label_key and txn_info_key, num_scanned=" << num_scanned
              << ", num_abnormal=" << num_abnormal;

    // check txn index key depend on txn info key
    begin = txn_info_key({instance_id_, 0, 0});
    end = txn_info_key({instance_id_, INT64_MAX, 0});
    num_scanned = 0;
    num_abnormal = 0;
    LOG(INFO) << "begin check txn_index_key and txn_info_key";
    ret = scan_and_handle_kv(begin, end, [&, this](std::string_view k, std::string_view v) -> int {
        num_scanned++;
        int ret = check_txn_index_key(k, v);
        if (ret == 1) {
            num_abnormal++;
        }
        return ret;
    });
    if (ret == 1) {
        LOG(WARNING) << "failed to check txn_idx_key depending on txn_info_key, num_scanned="
                     << num_scanned << ", num_abnormal=" << num_abnormal;
        return 1;
    } else if (ret == -1) {
        LOG(WARNING) << "failed to check txn index key";
        return -1;
    }
    LOG(INFO) << "finish check txn_index_key and txn_info_key, num_scanned=" << num_scanned
              << ", num_abnormal=" << num_abnormal;

    // check txn running key
    begin = txn_running_key({instance_id_, 0, 0});
    end = txn_running_key({instance_id_, INT64_MAX, 0});
    num_scanned = 0;
    num_abnormal = 0;
    LOG(INFO) << "begin check txn_running_key";
    ret = scan_and_handle_kv(begin, end, [&, this](std::string_view k, std::string_view v) -> int {
        num_scanned++;
        int ret = check_txn_running_key(k, v);
        if (ret == 1) {
            num_abnormal++;
        }
        return ret;
    });
    if (ret == 1) {
        LOG(WARNING) << "failed to check txn_running_key, num_scanned=" << num_scanned
                     << ", num_abnormal=" << num_abnormal;
        return 1;
    } else if (ret == -1) {
        LOG(WARNING) << "failed to check txn running key";
        return -1;
    }
    LOG(INFO) << "finish check txn_running_key, num_scanned=" << num_scanned
              << ", num_abnormal=" << num_abnormal;
    return 0;
}

int InstanceChecker::check_meta_tmp_rowset_key(std::string_view key, std::string_view value) {
    TxnInfoPB txn_info_pb;
    std::string_view k1 = key;
    k1.remove_prefix(1);
    std::vector<std::tuple<std::variant<int64_t, std::string>, int, int>> out;
    decode_key(&k1, &out);
    // 0x01 "txn" ${instance_id} "txn_info" ${db_id} ${txn_id}
    if (!txn_info_pb.ParseFromArray(value.data(), value.size())) {
        LOG(WARNING) << "failed to parse TxnInfoPB";
        return -1;
    }
    /// get tablet id
    auto txn_id = std::get<int64_t>(std::get<0>(out[4]));
    std::string txn_index = txn_index_key({instance_id_, txn_id});
    std::string txn_index_val;
    TxnIndexPB txn_index_pb;
    std::unique_ptr<Transaction> txn;
    TxnErrorCode err = txn_kv_->create_txn(&txn);
    if (err != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to init txn";
        return -1;
    }
    if (txn->get(txn_index, &txn_index_val) != TxnErrorCode::TXN_OK) {
        LOG(WARNING) << "failed to get txn index key, key=" << txn_index;
        return -1;
    }
    txn_index_pb.ParseFromString(txn_index_val);
    auto tablet_id = txn_index_pb.tablet_index().tablet_id();
    std::string meta_tmp_rowset_key = meta_rowset_tmp_key({instance_id_, txn_id, tablet_id});
    int is_key_exist = key_exist(txn_kv_.get(), meta_tmp_rowset_key);
    if (is_key_exist == 1) {
        if (txn_info_pb.status() != TxnStatusPB::TXN_STATUS_VISIBLE) {
            // clang-format off
            LOG(INFO) << "meta tmp rowset key not exist but txn status != TXN_STATUS_VISIBLE"
                        << "meta tmp rowset key=" << meta_tmp_rowset_key
                        << "txn_info=" << txn_info_pb.ShortDebugString();
            // clang-format on
            return 1;
        }
    } else if (is_key_exist == 0) {
        if (txn_info_pb.status() != TxnStatusPB::TXN_STATUS_PREPARED) {
            // clang-format off
            LOG(INFO) << "meta tmp rowset key exist but txn status != TXN_STATUS_PREPARED"
                        << "meta tmp rowset key=" << meta_tmp_rowset_key
                        << "txn_info=" << txn_info_pb.ShortDebugString();
            // clang-format on
            return 1;
        }
    } else {
        LOG(WARNING) << "failed to get key, key=" << meta_tmp_rowset_key;
        return -1;
    }
    return 0;
}

int InstanceChecker::check_meta_rowset_key(std::string_view key, std::string_view value) {
    RowsetMetaCloudPB meta_rowset_pb;
    if (!meta_rowset_pb.ParseFromArray(value.data(), value.size())) {
        LOG(WARNING) << "failed to parse RowsetMetaCloudPB";
        return -1;
    }
    std::string tablet_index_key = meta_tablet_idx_key({instance_id_, meta_rowset_pb.tablet_id()});
    if (key_exist(txn_kv_.get(), tablet_index_key) == 1) {
        LOG(WARNING) << "rowset's tablet id not found in fdb"
                     << "tablet_index_key: " << tablet_index_key
                     << "rowset meta: " << meta_rowset_pb.ShortDebugString();
        return 1;
    }
    return 0;
}

int InstanceChecker::do_meta_rowset_key_check() {
    int ret = 0;

    std::string begin = meta_rowset_key({instance_id_, 0, 0});
    std::string end = meta_rowset_key({instance_id_, INT64_MAX, 0});
    int64_t num_scanned = 0;
    int64_t num_loss = 0;

    ret = scan_and_handle_kv(begin, end, [&](std::string_view k, std::string_view v) {
        num_scanned++;
        int ret = check_meta_rowset_key(k, v);
        if (ret == 1) {
            num_loss++;
        }
        return ret;
    });
    if (ret == -1) {
        LOG(WARNING) << "failed to check meta rowset key,";
        return -1;
    } else if (ret == 1) {
        LOG(WARNING) << "meta rowset key may be loss, num_scanned=" << num_scanned
                     << ", num_loss=" << num_loss;
    }
    LOG(INFO) << "meta rowset key check finish, num_scanned=" << num_scanned
              << ", num_loss=" << num_loss;

    begin = txn_info_key({instance_id_, 0, 0});
    end = txn_info_key({instance_id_, INT64_MAX, 0});
    num_scanned = 0;
    num_loss = 0;

    ret = scan_and_handle_kv(begin, end, [&](std::string_view k, std::string_view v) {
        num_scanned++;
        int ret = check_meta_tmp_rowset_key(k, v);
        if (ret == 1) {
            num_loss++;
        }
        return ret;
    });
    if (ret == -1) {
        LOG(WARNING) << "failed to check tmp meta rowset key";
        return -1;
    } else if (ret == 1) {
        LOG(WARNING) << "meta tmp rowset key may be loss, num_scanned=" << num_scanned
                     << ", num_loss=" << num_loss;
    }
    LOG(INFO) << "meta tmp rowset key check finish, num_scanned=" << num_scanned
              << ", num_loss=" << num_loss;

    return ret;
}

StorageVaultAccessor* InstanceChecker::get_accessor(const std::string& id) {
    auto it = accessor_map_.find(id);
    if (it == accessor_map_.end()) {
        return nullptr;
    }
    return it->second.get();
}

void InstanceChecker::get_all_accessor(std::vector<StorageVaultAccessor*>* accessors) {
    for (const auto& [_, accessor] : accessor_map_) {
        accessors->push_back(accessor.get());
    }
}

int InstanceChecker::do_packed_file_check() {
    LOG(INFO) << "begin to check packed files, instance_id=" << instance_id_;
    int check_ret = 0;
    long num_scanned_rowsets = 0;
    long num_scanned_packed_files = 0;
    long num_packed_file_loss = 0;
    long num_packed_file_leak = 0;
    long num_ref_count_mismatch = 0;
    long num_small_file_ref_mismatch = 0;
    using namespace std::chrono;
    auto start_time = steady_clock::now();
    DORIS_CLOUD_DEFER {
        auto cost = duration<float>(steady_clock::now() - start_time).count();
        LOG(INFO) << "check packed files finished, cost=" << cost
                  << "s. instance_id=" << instance_id_
                  << " num_scanned_rowsets=" << num_scanned_rowsets
                  << " num_scanned_packed_files=" << num_scanned_packed_files
                  << " num_packed_file_loss=" << num_packed_file_loss
                  << " num_packed_file_leak=" << num_packed_file_leak
                  << " num_ref_count_mismatch=" << num_ref_count_mismatch
                  << " num_small_file_ref_mismatch=" << num_small_file_ref_mismatch;
    };

    // Map to track expected reference count for each packed file
    // packed_file_path -> expected_ref_count (from rowset metas)
    std::unordered_map<std::string, int64_t> expected_ref_counts;
    // Map to track small files referenced in packed files
    // packed_file_path -> set of small_file_paths
    std::unordered_map<std::string, std::unordered_set<std::string>> packed_file_small_files;

    // Step 1: Scan all rowset metas to collect packed_slice_locations references
    // Use efficient range scan instead of iterating through each tablet_id
    auto collect_packed_refs = [&](const doris::RowsetMetaCloudPB& rs_meta) {
        const auto& index_map = rs_meta.packed_slice_locations();
        for (const auto& [small_file_path, index_pb] : index_map) {
            if (!index_pb.has_packed_file_path() || index_pb.packed_file_path().empty()) {
                continue;
            }
            const std::string& packed_file_path = index_pb.packed_file_path();
            expected_ref_counts[packed_file_path]++;
            packed_file_small_files[packed_file_path].insert(small_file_path);
        }
    };

    {
        std::string start_key = meta_rowset_key({instance_id_, 0, 0});
        std::string end_key = meta_rowset_key({instance_id_, INT64_MAX, 0});

        std::unique_ptr<RangeGetIterator> it;
        while (it == nullptr /* may be not init */ || (it->more() && !stopped())) {
            if (stopped()) {
                return -1;
            }

            std::unique_ptr<Transaction> txn;
            TxnErrorCode err = txn_kv_->create_txn(&txn);
            if (err != TxnErrorCode::TXN_OK) {
                LOG(WARNING) << "failed to create txn for packed file check";
                return -1;
            }

            err = txn->get(start_key, end_key, &it);
            if (err != TxnErrorCode::TXN_OK) {
                LOG(WARNING) << "failed to scan rowset metas, err=" << err;
                check_ret = -1;
                break;
            }

            while (it->has_next() && !stopped()) {
                auto [k, v] = it->next();
                if (!it->has_next()) {
                    start_key = k;
                }

                doris::RowsetMetaCloudPB rs_meta;
                if (!rs_meta.ParseFromArray(v.data(), v.size())) {
                    LOG(WARNING) << "malformed rowset meta, key=" << hex(k);
                    check_ret = -1;
                    continue;
                }

                num_scanned_rowsets++;

                collect_packed_refs(rs_meta);
            }
            start_key.push_back('\x00'); // Update to next smallest key for iteration
        }
    }

    // Rowsets in recycle keys may still hold packed file references while ref count
    // updates are pending, so include them when calculating expected references.
    {
        std::string start_key = recycle_rowset_key({instance_id_, 0, ""});
        std::string end_key = recycle_rowset_key({instance_id_, INT64_MAX, "\xff"});

        std::unique_ptr<RangeGetIterator> it;
        while (it == nullptr /* may be not init */ || it->more()) {
            if (stopped()) {
                return -1;
            }
            std::unique_ptr<Transaction> txn;
            TxnErrorCode err = txn_kv_->create_txn(&txn);
            if (err != TxnErrorCode::TXN_OK) {
                LOG(WARNING) << "failed to create txn for recycle rowset scan in packed file check";
                return -1;
            }

            err = txn->get(start_key, end_key, &it);
            if (err != TxnErrorCode::TXN_OK) {
                LOG(WARNING) << "failed to scan recycle rowset metas, err=" << err;
                check_ret = -1;
                break;
            }

            while (it->has_next() && !stopped()) {
                auto [k, v] = it->next();
                if (!it->has_next()) {
                    start_key = k;
                }

                RecycleRowsetPB recycle_rowset;
                if (!recycle_rowset.ParseFromArray(v.data(), v.size())) {
                    LOG(WARNING) << "malformed recycle rowset, key=" << hex(k);
                    check_ret = -1;
                    continue;
                }

                if (!recycle_rowset.has_rowset_meta()) {
                    continue;
                }

                num_scanned_rowsets++;
                collect_packed_refs(recycle_rowset.rowset_meta());
            }
            start_key.push_back('\x00'); // Update to next smallest key for iteration
        }
    }

    // Step 2: Scan all packed file metadata and verify
    // Also collect all packed file paths from metadata for Step 3
    // Map: resource_id -> set of packed_file_paths
    std::unordered_map<std::string, std::unordered_set<std::string>> packed_files_in_metadata;
    std::string begin = packed_file_key({instance_id_, ""});
    std::string end = packed_file_key({instance_id_, "\xff"});
    std::string scan_begin = begin;

    while (true) {
        if (stopped()) {
            return -1;
        }

        std::unique_ptr<Transaction> txn;
        TxnErrorCode err = txn_kv_->create_txn(&txn);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to create txn for scanning packed files";
            return -1;
        }

        std::unique_ptr<RangeGetIterator> it;
        err = txn->get(scan_begin, end, &it);
        if (err != TxnErrorCode::TXN_OK) {
            LOG(WARNING) << "failed to scan packed file keys, err=" << err;
            return -1;
        }
        if (!it->has_next()) {
            break;
        }

        std::string last_key;
        while (it->has_next()) {
            auto [k, v] = it->next();
            last_key.assign(k.data(), k.size());
            num_scanned_packed_files++;

            std::string packed_file_path;
            if (!InstanceRecycler::decode_packed_file_key(k, &packed_file_path)) {
                LOG(WARNING) << "failed to decode packed file key, key=" << hex(k);
                check_ret = -1;
                continue;
            }

            cloud::PackedFileInfoPB packed_info;
            if (!packed_info.ParseFromArray(v.data(), v.size())) {
                LOG(WARNING) << "failed to parse packed file info, packed_file_path="
                             << packed_file_path;
                check_ret = -1;
                continue;
            }

            // Step 2.1: Verify packed file exists in storage
            if (!packed_info.resource_id().empty()) {
                // Collect packed file path for Step 3
                packed_files_in_metadata[packed_info.resource_id()].insert(packed_file_path);

                auto* accessor = get_accessor(packed_info.resource_id());
                if (accessor == nullptr) {
                    LOG(WARNING) << "accessor not found for packed file, resource_id="
                                 << packed_info.resource_id()
                                 << ", packed_file_path=" << packed_file_path;
                    check_ret = -1;
                    continue;
                }

                int ret = accessor->exists(packed_file_path);
                if (ret < 0) {
                    LOG(WARNING) << "failed to check packed file existence, packed_file_path="
                                 << packed_file_path << ", ret=" << ret;
                    check_ret = -1;
                    continue;
                }

                if (ret != 0) {
                    // ret == 1 means file not found, ret > 1 means other error
                    // When packed file doesn't exist in storage, ref_cnt must be 0 and state must be RECYCLING
                    bool ref_cnt_valid = (packed_info.ref_cnt() == 0);
                    bool state_valid = (packed_info.state() == cloud::PackedFileInfoPB::RECYCLING);
                    if (!ref_cnt_valid || !state_valid) {
                        LOG(WARNING) << "packed file not found in storage but metadata is invalid, "
                                        "packed_file_path="
                                     << packed_file_path << ", ref_cnt=" << packed_info.ref_cnt()
                                     << " (expected=0), state=" << packed_info.state()
                                     << " (expected=RECYCLING), ret=" << ret;
                        num_packed_file_loss++;
                        check_ret = 1; // Data inconsistency identified
                    }
                    // If ref_cnt == 0 and state == RECYCLING, this is expected (file is being recycled)
                }
                // ret == 0 means file exists, which is expected
            }

            // Step 2.2: Verify reference count matches expected count
            int64_t expected_ref = expected_ref_counts[packed_file_path];
            if (packed_info.ref_cnt() != expected_ref) {
                LOG(WARNING) << "packed file ref count mismatch, packed_file_path="
                             << packed_file_path << ", expected=" << expected_ref
                             << ", actual=" << packed_info.ref_cnt();
                num_ref_count_mismatch++;
                check_ret = 1; // Data inconsistency identified
            }

            // Step 2.3: Verify small files in packed_info match rowset references
            std::unordered_set<std::string> small_files_in_meta;
            for (const auto& small_file : packed_info.slices()) {
                if (!small_file.deleted()) {
                    small_files_in_meta.insert(small_file.path());
                }
            }

            const auto& expected_small_files = packed_file_small_files[packed_file_path];
            if (small_files_in_meta != expected_small_files) {
                // Check for missing small files
                for (const auto& expected_path : expected_small_files) {
                    if (small_files_in_meta.find(expected_path) == small_files_in_meta.end()) {
                        LOG(WARNING) << "small file missing in packed file info, packed_file_path="
                                     << packed_file_path << ", small_file_path=" << expected_path;
                        num_small_file_ref_mismatch++;
                        check_ret = 1;
                    }
                }
                // Check for extra small files (may be deleted, so less critical)
                for (const auto& meta_path : small_files_in_meta) {
                    if (expected_small_files.find(meta_path) == expected_small_files.end()) {
                        LOG(INFO) << "small file in packed file info not found in rowset metas, "
                                     "may be deleted, packed_file_path="
                                  << packed_file_path << ", small_file_path=" << meta_path;
                    }
                }
            }
        }

        if (!it->more()) {
            break;
        }
        scan_begin = last_key;
        scan_begin.push_back('\x00');
    }

    // Step 3: Check for leaked packed files (exist in storage but not in metadata)
    // Scan all storage vaults to find packed files and verify they are in metadata
    {
        std::vector<StorageVaultAccessor*> accessors;
        get_all_accessor(&accessors);

        for (StorageVaultAccessor* accessor : accessors) {
            if (stopped()) {
                return -1;
            }

            // Find resource_id for this accessor
            std::string resource_id;
            for (const auto& [id, acc] : accessor_map_) {
                if (acc.get() == accessor) {
                    resource_id = id;
                    break;
                }
            }

            if (resource_id.empty()) {
                continue;
            }

            // List all files under data/packed_file/ directory
            std::unique_ptr<ListIterator> list_it;
            int ret = accessor->list_directory("data/packed_file", &list_it);
            if (ret != 0) {
                // Directory may not exist, which is fine
                if (ret < 0) {
                    LOG(WARNING) << "failed to list packed_file directory, resource_id="
                                 << resource_id << ", ret=" << ret;
                    check_ret = -1;
                }
                continue;
            }

            const auto& expected_packed_files = packed_files_in_metadata[resource_id];
            while (list_it->has_next()) {
                if (stopped()) {
                    return -1;
                }

                auto file_meta = list_it->next();
                if (!file_meta.has_value()) {
                    break;
                }

                const std::string& file_path = file_meta->path;
                // Only check files (not directories), and ensure it's a packed file
                // Skip directories (paths ending with '/') and non-packed-file paths
                if (file_path.empty() || file_path.back() == '/' ||
                    !file_path.starts_with("data/packed_file/")) {
                    continue;
                }

                // Check if this packed file is in metadata
                if (expected_packed_files.find(file_path) == expected_packed_files.end()) {
                    LOG(WARNING) << "packed file found in storage but not in metadata, "
                                    "resource_id="
                                 << resource_id << ", packed_file_path=" << file_path;
                    num_packed_file_leak++;
                    check_ret = 1; // Data leak identified
                }
            }
        }
    }

    if (num_packed_file_loss > 0 || num_packed_file_leak > 0 || num_ref_count_mismatch > 0 ||
        num_small_file_ref_mismatch > 0) {
        return 1; // Data loss or inconsistency identified
    }

    if (check_ret < 0) {
        return check_ret; // Temporary error
    }

    return 0; // Success
}
} // namespace doris::cloud