| // 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 "service/impala-server.h" |
| |
| #include <netdb.h> |
| #include <unistd.h> |
| #include <algorithm> |
| #include <exception> |
| #include <boost/algorithm/string.hpp> |
| #include <boost/algorithm/string/join.hpp> |
| #include <boost/algorithm/string/replace.hpp> |
| #include <boost/algorithm/string/trim.hpp> |
| #include <boost/bind.hpp> |
| #include <boost/date_time/posix_time/posix_time_types.hpp> |
| #include <boost/filesystem.hpp> |
| #include <boost/lexical_cast.hpp> |
| #include <boost/unordered_set.hpp> |
| #include <gperftools/malloc_extension.h> |
| #include <gutil/strings/numbers.h> |
| #include <gutil/strings/split.h> |
| #include <gutil/strings/substitute.h> |
| #include <gutil/walltime.h> |
| #include <openssl/err.h> |
| #include <openssl/evp.h> |
| #include <rapidjson/rapidjson.h> |
| #include <rapidjson/stringbuffer.h> |
| #include <rapidjson/writer.h> |
| #include <rapidjson/error/en.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| |
| #include "catalog/catalog-server.h" |
| #include "catalog/catalog-util.h" |
| #include "common/compiler-util.h" |
| #include "common/logging.h" |
| #include "common/thread-debug-info.h" |
| #include "common/version.h" |
| #include "exec/external-data-source-executor.h" |
| #include "exprs/timezone_db.h" |
| #include "gen-cpp/CatalogService_constants.h" |
| #include "kudu/util/random_util.h" |
| #include "rpc/authentication.h" |
| #include "rpc/rpc-trace.h" |
| #include "rpc/thrift-thread.h" |
| #include "rpc/thrift-util.h" |
| #include "runtime/client-cache.h" |
| #include "runtime/coordinator.h" |
| #include "runtime/exec-env.h" |
| #include "runtime/lib-cache.h" |
| #include "runtime/timestamp-value.h" |
| #include "runtime/timestamp-value.inline.h" |
| #include "runtime/tmp-file-mgr.h" |
| #include "scheduling/admission-controller.h" |
| #include "service/cancellation-work.h" |
| #include "service/impala-http-handler.h" |
| #include "service/impala-internal-service.h" |
| #include "service/client-request-state.h" |
| #include "service/frontend.h" |
| #include "util/auth-util.h" |
| #include "util/bit-util.h" |
| #include "util/debug-util.h" |
| #include "util/error-util.h" |
| #include "util/histogram-metric.h" |
| #include "util/impalad-metrics.h" |
| #include "util/metrics.h" |
| #include "util/network-util.h" |
| #include "util/openssl-util.h" |
| #include "util/parse-util.h" |
| #include "util/pretty-printer.h" |
| #include "util/redactor.h" |
| #include "util/runtime-profile-counters.h" |
| #include "util/runtime-profile.h" |
| #include "util/string-parser.h" |
| #include "util/summary-util.h" |
| #include "util/test-info.h" |
| #include "util/uid-util.h" |
| #include "util/time.h" |
| |
| #include "gen-cpp/Types_types.h" |
| #include "gen-cpp/ImpalaService.h" |
| #include "gen-cpp/DataSinks_types.h" |
| #include "gen-cpp/ImpalaService_types.h" |
| #include "gen-cpp/ImpalaInternalService.h" |
| #include "gen-cpp/LineageGraph_types.h" |
| #include "gen-cpp/Frontend_types.h" |
| |
| #include "common/names.h" |
| |
| using boost::adopt_lock_t; |
| using boost::algorithm::is_any_of; |
| using boost::algorithm::istarts_with; |
| using boost::algorithm::join; |
| using boost::algorithm::replace_all_copy; |
| using boost::algorithm::split; |
| using boost::algorithm::token_compress_on; |
| using boost::get_system_time; |
| using boost::system_time; |
| using boost::uuids::random_generator; |
| using boost::uuids::uuid; |
| using kudu::GetRandomSeed32; |
| using namespace apache::hive::service::cli::thrift; |
| using namespace apache::thrift; |
| using namespace apache::thrift::transport; |
| using namespace beeswax; |
| using namespace boost::posix_time; |
| using namespace rapidjson; |
| using namespace strings; |
| |
| DECLARE_string(nn); |
| DECLARE_int32(nn_port); |
| DECLARE_string(authorized_proxy_user_config); |
| DECLARE_string(authorized_proxy_user_config_delimiter); |
| DECLARE_string(authorized_proxy_group_config); |
| DECLARE_string(authorized_proxy_group_config_delimiter); |
| DECLARE_string(debug_actions); |
| DECLARE_bool(abort_on_config_error); |
| DECLARE_bool(disk_spill_encryption); |
| DECLARE_bool(enable_ldap_auth); |
| DECLARE_bool(use_local_catalog); |
| |
| DEFINE_int32(beeswax_port, 21000, "port on which Beeswax client requests are served." |
| "If 0 or less, the Beeswax server is not started."); |
| DEFINE_int32(hs2_port, 21050, "port on which HiveServer2 client requests are served." |
| "If 0 or less, the HiveServer2 server is not started."); |
| DEFINE_int32(hs2_http_port, 28000, "port on which HiveServer2 HTTP(s) client " |
| "requests are served. If 0 or less, the HiveServer2 http server is not started."); |
| |
| DEFINE_int32(fe_service_threads, 64, |
| "number of threads available to serve client requests"); |
| DEFINE_string(default_query_options, "", "key=value pair of default query options for" |
| " impalad, separated by ','"); |
| DEFINE_int32(query_log_size, 25, "Number of queries to retain in the query log. If -1, " |
| "the query log has unbounded size."); |
| DEFINE_bool(log_query_to_file, true, "if true, logs completed query profiles to file."); |
| |
| DEFINE_int64(max_result_cache_size, 100000L, "Maximum number of query results a client " |
| "may request to be cached on a per-query basis to support restarting fetches. This " |
| "option guards against unreasonably large result caches requested by clients. " |
| "Requests exceeding this maximum will be rejected."); |
| |
| DEFINE_int32(max_audit_event_log_file_size, 5000, "The maximum size (in queries) of the " |
| "audit event log file before a new one is created (if event logging is enabled)"); |
| DEFINE_string(audit_event_log_dir, "", "The directory in which audit event log files are " |
| "written. Setting this flag will enable audit event logging."); |
| DEFINE_bool(abort_on_failed_audit_event, true, "Shutdown Impala if there is a problem " |
| "recording an audit event."); |
| |
| DEFINE_int32(max_lineage_log_file_size, 5000, "The maximum size (in queries) of " |
| "the lineage event log file before a new one is created (if lineage logging is " |
| "enabled)"); |
| DEFINE_string(lineage_event_log_dir, "", "The directory in which lineage event log " |
| "files are written. Setting this flag with enable lineage logging."); |
| DEFINE_bool(abort_on_failed_lineage_event, true, "Shutdown Impala if there is a problem " |
| "recording a lineage record."); |
| |
| DEFINE_string(profile_log_dir, "", "The directory in which profile log files are" |
| " written. If blank, defaults to <log_file_dir>/profiles"); |
| DEFINE_int32(max_profile_log_file_size, 5000, "The maximum size (in queries) of the " |
| "profile log file before a new one is created"); |
| DEFINE_int32(max_profile_log_files, 10, "Maximum number of profile log files to " |
| "retain. The most recent log files are retained. If set to 0, all log files " |
| "are retained."); |
| |
| DEFINE_int32(cancellation_thread_pool_size, 5, |
| "(Advanced) Size of the thread-pool processing cancellations due to node failure"); |
| |
| DEFINE_string(ssl_server_certificate, "", "The full path to the SSL certificate file used" |
| " to authenticate Impala to clients. If set, both Beeswax and HiveServer2 ports will " |
| "only accept SSL connections"); |
| DEFINE_string(ssl_private_key, "", "The full path to the private key used as a " |
| "counterpart to the public key contained in --ssl_server_certificate. If " |
| "--ssl_server_certificate is set, this option must be set as well."); |
| DEFINE_string(ssl_client_ca_certificate, "", "(Advanced) The full path to a certificate " |
| "used by Thrift clients to check the validity of a server certificate. May either be " |
| "a certificate for a third-party Certificate Authority, or a copy of the certificate " |
| "the client expects to receive from the server."); |
| DEFINE_string(ssl_private_key_password_cmd, "", "A Unix command whose output returns the " |
| "password used to decrypt the certificate private key file specified in " |
| "--ssl_private_key. If the .PEM key file is not password-protected, this command " |
| "will not be invoked. The output of the command will be truncated to 1024 bytes, and " |
| "then all trailing whitespace will be trimmed before it is used to decrypt the " |
| "private key"); |
| |
| // TODO: For 3.0 (compatibility-breaking release), set this to a whitelist of ciphers, |
| // e.g. https://wiki.mozilla.org/Security/Server_Side_TLS |
| DEFINE_string(ssl_cipher_list, "", |
| "The cipher suite preferences to use for TLS-secured " |
| "Thrift RPC connections. Uses the OpenSSL cipher preference list format. See man (1) " |
| "ciphers for more information. If empty, the default cipher list for your platform " |
| "is used"); |
| |
| const string SSL_MIN_VERSION_HELP = "The minimum SSL/TLS version that Thrift " |
| "services should use for both client and server connections. Supported versions are " |
| "TLSv1.0, TLSv1.1 and TLSv1.2 (as long as the system OpenSSL library supports them)"; |
| DEFINE_string(ssl_minimum_version, "tlsv1", SSL_MIN_VERSION_HELP.c_str()); |
| |
| DEFINE_int32(idle_session_timeout, 0, "The time, in seconds, that a session may be idle" |
| " for before it is closed (and all running queries cancelled) by Impala. If 0, idle" |
| " sessions are never expired. It can be overridden by the query option" |
| " 'idle_session_timeout' for specific sessions"); |
| DEFINE_int32(idle_query_timeout, 0, "The time, in seconds, that a query may be idle for" |
| " (i.e. no processing work is done and no updates are received from the client) " |
| "before it is cancelled. If 0, idle queries are never expired. The query option " |
| "QUERY_TIMEOUT_S overrides this setting, but, if set, --idle_query_timeout represents" |
| " the maximum allowable timeout."); |
| DEFINE_int32(disconnected_session_timeout, 15 * 60, "The time, in seconds, that a " |
| "hiveserver2 session will be maintained after the last connection that it has been " |
| "used over is disconnected."); |
| DEFINE_int32(idle_client_poll_period_s, 30, "The poll period, in seconds, after " |
| "no activity from an Impala client which an Impala service thread (beeswax and HS2) " |
| "wakes up to check if the connection should be closed. If --idle_session_timeout is " |
| "also set, a client connection will be closed if all the sessions associated with it " |
| "have become idle. Set this to 0 to disable the polling behavior and clients' " |
| "connection will remain opened until they are explicitly closed."); |
| DEFINE_int32(status_report_interval_ms, 5000, "(Advanced) Interval between profile " |
| "reports in milliseconds. If set to <= 0, periodic reporting is disabled and only " |
| "the final report is sent."); |
| DEFINE_int32(status_report_max_retry_s, 600, "(Advanced) Max amount of time in seconds " |
| "for a backend to attempt to send a status report before cancelling. This must be > " |
| "--status_report_interval_ms. Effective only if --status_report_interval_ms > 0."); |
| DEFINE_int32(status_report_cancellation_padding, 20, "(Advanced) The coordinator will " |
| "wait --status_report_max_retry_s * (1 + --status_report_cancellation_padding / 100) " |
| "without receiving a status report before deciding that a backend is unresponsive " |
| "and the query should be cancelled. This must be > 0."); |
| |
| DEFINE_bool(is_coordinator, true, "If true, this Impala daemon can accept and coordinate " |
| "queries from clients. If false, it will refuse client connections."); |
| DEFINE_bool(is_executor, true, "If true, this Impala daemon will execute query " |
| "fragments."); |
| DEFINE_string(executor_groups, "", |
| "List of executor groups, separated by comma. Each executor group specification can " |
| "optionally contain a minimum size, separated by a ':', e.g. --executor_groups " |
| "default-pool-1:3. Default minimum size is 1. Only when the cluster membership " |
| "contains at least that number of executors for the group will it be considered " |
| "healthy for admission. Currently only a single group may be specified."); |
| |
| // TODO: can we automatically choose a startup grace period based on the max admission |
| // control queue timeout + some margin for error? |
| DEFINE_int64(shutdown_grace_period_s, 120, "Shutdown startup grace period in seconds. " |
| "When the shutdown process is started for this daemon, it will wait for at least the " |
| "startup grace period before shutting down. This gives time for updated cluster " |
| "membership information to propagate to all coordinators and for fragment instances " |
| "that were scheduled based on old cluster membership to start executing (and " |
| "therefore be reflected in the metrics used to detect quiescence)."); |
| |
| DEFINE_int64(shutdown_deadline_s, 60 * 60, "Default time limit in seconds for the shut " |
| "down process. If this duration elapses after the shut down process is started, " |
| "the daemon shuts down regardless of any running queries."); |
| |
| #ifndef NDEBUG |
| DEFINE_int64(stress_metadata_loading_pause_injection_ms, 0, "Simulates metadata loading" |
| "for a given query by injecting a sleep equivalent to this configuration in " |
| "milliseconds. Only used for testing."); |
| #endif |
| |
| DEFINE_int64(accepted_client_cnxn_timeout, 300000, |
| "(Advanced) The amount of time in milliseconds an accepted connection will wait in " |
| "the post-accept, pre-setup connection queue before it is timed out and the " |
| "connection request is rejected. A value of 0 means there is no timeout."); |
| |
| DEFINE_string(query_event_hook_classes, "", "Comma-separated list of java QueryEventHook " |
| "implementation classes to load and register at Impala startup. Class names should " |
| "be fully-qualified and on the classpath. Whitespace acceptable around delimiters."); |
| |
| DEFINE_int32(query_event_hook_nthreads, 1, "Number of threads to use for " |
| "QueryEventHook execution. If this number is >1 then hooks will execute " |
| "concurrently."); |
| |
| DECLARE_bool(compact_catalog_topic); |
| |
| namespace { |
| using namespace impala; |
| |
| vector<impala::TExecutorGroupDesc> GetExecutorGroups(const string& flag) { |
| vector<impala::TExecutorGroupDesc> result; |
| vector<StringPiece> groups; |
| groups = Split(flag, ",", SkipEmpty()); |
| if (groups.empty()) groups.push_back(ImpalaServer::DEFAULT_EXECUTOR_GROUP_NAME); |
| DCHECK_EQ(1, groups.size()); |
| // Name and optional minimum group size are separated by ':'. |
| for (const StringPiece& group : groups) { |
| int colon_idx = group.find_first_of(':'); |
| TExecutorGroupDesc group_desc; |
| group_desc.name = group.substr(0, colon_idx).as_string(); |
| group_desc.min_size = 1; |
| if (colon_idx != StringPiece::npos) { |
| StringParser::ParseResult result; |
| group_desc.min_size = StringParser::StringToInt<int64_t>( |
| group.data() + colon_idx + 1, group.length() - colon_idx - 1, &result); |
| if (result != StringParser::PARSE_SUCCESS) { |
| LOG(FATAL) << "Failed to parse minimum executor group size from group: " |
| << group.ToString(); |
| } |
| } |
| result.push_back(group_desc); |
| } |
| return result; |
| } |
| } // end anonymous namespace |
| |
| namespace impala { |
| |
| // Prefix of profile, event and lineage log filenames. The version number is |
| // internal, and does not correspond to an Impala release - it should |
| // be changed only when the file format changes. |
| // |
| // In the 1.0 version of the profile log, the timestamp at the beginning of each entry |
| // was relative to the local time zone. In log version 1.1, this was changed to be |
| // relative to UTC. The same time zone change was made for the audit log, but the |
| // version was kept at 1.0 because there is no known consumer of the timestamp. |
| const string PROFILE_LOG_FILE_PREFIX = "impala_profile_log_1.1-"; |
| const string ImpalaServer::AUDIT_EVENT_LOG_FILE_PREFIX = "impala_audit_event_log_1.0-"; |
| const string LINEAGE_LOG_FILE_PREFIX = "impala_lineage_log_1.0-"; |
| |
| const uint32_t MAX_CANCELLATION_QUEUE_SIZE = 65536; |
| |
| const string BEESWAX_SERVER_NAME = "beeswax-frontend"; |
| const string HS2_SERVER_NAME = "hiveserver2-frontend"; |
| const string HS2_HTTP_SERVER_NAME = "hiveserver2-http-frontend"; |
| |
| const string ImpalaServer::DEFAULT_EXECUTOR_GROUP_NAME = "default"; |
| |
| const char* ImpalaServer::SQLSTATE_SYNTAX_ERROR_OR_ACCESS_VIOLATION = "42000"; |
| const char* ImpalaServer::SQLSTATE_GENERAL_ERROR = "HY000"; |
| const char* ImpalaServer::SQLSTATE_OPTIONAL_FEATURE_NOT_IMPLEMENTED = "HYC00"; |
| |
| // Interval between checks for query expiration. |
| const int64_t EXPIRATION_CHECK_INTERVAL_MS = 1000L; |
| |
| // Template to return error messages for client requests that could not be found, belonged |
| // to the wrong session, or had a mismatched secret. We need to use this particular string |
| // in some places because the shell has a regex for it. |
| // TODO: Make consistent with "Invalid query handle: $0" template used elsewhere. |
| // TODO: this should be turned into a proper error code and used throughout ImpalaServer. |
| static const char* LEGACY_INVALID_QUERY_HANDLE_TEMPLATE = "Query id $0 not found."; |
| |
| ThreadSafeRandom ImpalaServer::rng_(GetRandomSeed32()); |
| |
| ImpalaServer::ImpalaServer(ExecEnv* exec_env) |
| : exec_env_(exec_env), |
| services_started_(false) { |
| // Initialize default config |
| InitializeConfigVariables(); |
| |
| Status status = exec_env_->frontend()->ValidateSettings(); |
| if (!status.ok()) { |
| LOG(ERROR) << status.GetDetail(); |
| if (FLAGS_abort_on_config_error) { |
| CLEAN_EXIT_WITH_ERROR( |
| "Aborting Impala Server startup due to improper configuration"); |
| } |
| } |
| |
| status = exec_env_->tmp_file_mgr()->Init(exec_env_->metrics()); |
| if (!status.ok()) { |
| LOG(ERROR) << status.GetDetail(); |
| if (FLAGS_abort_on_config_error) { |
| CLEAN_EXIT_WITH_ERROR("Aborting Impala Server startup due to improperly " |
| "configured scratch directories."); |
| } |
| } |
| |
| if (!InitProfileLogging().ok()) { |
| LOG(ERROR) << "Query profile archival is disabled"; |
| FLAGS_log_query_to_file = false; |
| } |
| |
| if (!InitAuditEventLogging().ok()) { |
| CLEAN_EXIT_WITH_ERROR("Aborting Impala Server startup due to failure initializing " |
| "audit event logging"); |
| } |
| |
| if (!InitLineageLogging().ok()) { |
| CLEAN_EXIT_WITH_ERROR("Aborting Impala Server startup due to failure initializing " |
| "lineage logging"); |
| } |
| |
| if (!FLAGS_authorized_proxy_user_config.empty()) { |
| Status status = PopulateAuthorizedProxyConfig(FLAGS_authorized_proxy_user_config, |
| FLAGS_authorized_proxy_user_config_delimiter, &authorized_proxy_user_config_); |
| if (!status.ok()) { |
| CLEAN_EXIT_WITH_ERROR(Substitute("Invalid proxy user configuration." |
| "No mapping value specified for the proxy user. For more information review " |
| "usage of the --authorized_proxy_user_config flag: $0", status.GetDetail())); |
| } |
| } |
| |
| if (!FLAGS_authorized_proxy_group_config.empty()) { |
| Status status = PopulateAuthorizedProxyConfig(FLAGS_authorized_proxy_group_config, |
| FLAGS_authorized_proxy_group_config_delimiter, &authorized_proxy_group_config_); |
| if (!status.ok()) { |
| CLEAN_EXIT_WITH_ERROR(Substitute("Invalid proxy group configuration. " |
| "No mapping value specified for the proxy group. For more information review " |
| "usage of the --authorized_proxy_group_config flag: $0", status.GetDetail())); |
| } |
| } |
| |
| if (FLAGS_disk_spill_encryption) { |
| // Initialize OpenSSL for spilling encryption. This is not thread-safe so we |
| // initialize it once on startup. |
| // TODO: Set OpenSSL callbacks to provide locking to make the library thread-safe. |
| OpenSSL_add_all_algorithms(); |
| ERR_load_crypto_strings(); |
| } |
| |
| ABORT_IF_ERROR(ExternalDataSourceExecutor::InitJNI(exec_env_->metrics())); |
| |
| // Register the catalog update callback if running in a real cluster as a coordinator. |
| if (!TestInfo::is_test() && FLAGS_is_coordinator) { |
| auto catalog_cb = [this] (const StatestoreSubscriber::TopicDeltaMap& state, |
| vector<TTopicDelta>* topic_updates) { |
| this->CatalogUpdateCallback(state, topic_updates); |
| }; |
| // The 'local-catalog' implementation only needs minimal metadata to |
| // trigger cache invalidations. |
| // The legacy implementation needs full metadata objects. |
| string filter_prefix = FLAGS_use_local_catalog ? |
| g_CatalogService_constants.CATALOG_TOPIC_V2_PREFIX : |
| g_CatalogService_constants.CATALOG_TOPIC_V1_PREFIX; |
| ABORT_IF_ERROR(exec_env->subscriber()->AddTopic( |
| CatalogServer::IMPALA_CATALOG_TOPIC, /* is_transient=*/ true, |
| /* populate_min_subscriber_topic_version=*/ true, |
| filter_prefix, catalog_cb)); |
| } |
| |
| ABORT_IF_ERROR(UpdateCatalogMetrics()); |
| |
| // Initialise the cancellation thread pool with 5 (by default) threads. The max queue |
| // size is deliberately set so high that it should never fill; if it does the |
| // cancellations will get ignored and retried on the next statestore heartbeat. |
| cancellation_thread_pool_.reset(new ThreadPool<CancellationWork>( |
| "impala-server", "cancellation-worker", |
| FLAGS_cancellation_thread_pool_size, MAX_CANCELLATION_QUEUE_SIZE, |
| bind<void>(&ImpalaServer::CancelFromThreadPool, this, _1, _2))); |
| ABORT_IF_ERROR(cancellation_thread_pool_->Init()); |
| |
| // Initialize a session expiry thread which blocks indefinitely until the first session |
| // with non-zero timeout value is opened. Note that a session which doesn't specify any |
| // idle session timeout value will use the default value FLAGS_idle_session_timeout. |
| ABORT_IF_ERROR(Thread::Create("impala-server", "session-maintenance", |
| bind<void>(&ImpalaServer::SessionMaintenance, this), &session_maintenance_thread_)); |
| |
| ABORT_IF_ERROR(Thread::Create("impala-server", "query-expirer", |
| bind<void>(&ImpalaServer::ExpireQueries, this), &query_expiration_thread_)); |
| |
| // Only enable the unresponsive backend thread if periodic status reporting is enabled. |
| if (FLAGS_status_report_interval_ms > 0) { |
| if (FLAGS_status_report_max_retry_s * 1000 <= FLAGS_status_report_interval_ms) { |
| const string& err = "Since --status_report_max_retry_s <= " |
| "--status_report_interval_ms, most queries will likely be cancelled."; |
| LOG(ERROR) << err; |
| if (FLAGS_abort_on_config_error) { |
| CLEAN_EXIT_WITH_ERROR(Substitute("Aborting Impala Server startup: $0", err)); |
| } |
| } |
| if (FLAGS_status_report_cancellation_padding <= 0) { |
| const string& err = "--status_report_cancellationn_padding should be > 0."; |
| LOG(ERROR) << err; |
| if (FLAGS_abort_on_config_error) { |
| CLEAN_EXIT_WITH_ERROR(Substitute("Aborting Impala Server startup: $0", err)); |
| } |
| } |
| ABORT_IF_ERROR(Thread::Create("impala-server", "unresponsive-backend-thread", |
| bind<void>(&ImpalaServer::UnresponsiveBackendThread, this), |
| &unresponsive_backend_thread_)); |
| } |
| |
| is_coordinator_ = FLAGS_is_coordinator; |
| is_executor_ = FLAGS_is_executor; |
| } |
| |
| Status ImpalaServer::PopulateAuthorizedProxyConfig( |
| const string& authorized_proxy_config, |
| const string& authorized_proxy_config_delimiter, |
| AuthorizedProxyMap* authorized_proxy_config_map) { |
| // Parse the proxy user configuration using the format: |
| // <proxy user>=<comma separated list of users/groups they are allowed to delegate> |
| // See FLAGS_authorized_proxy_user_config or FLAGS_authorized_proxy_group_config |
| // for more details. |
| vector<string> proxy_config; |
| split(proxy_config, authorized_proxy_config, is_any_of(";"), |
| token_compress_on); |
| if (proxy_config.size() > 0) { |
| for (const string& config: proxy_config) { |
| size_t pos = config.find("="); |
| if (pos == string::npos) { |
| return Status(config); |
| } |
| string proxy_user = config.substr(0, pos); |
| boost::trim(proxy_user); |
| string config_str = config.substr(pos + 1); |
| boost::trim(config_str); |
| vector<string> parsed_allowed_users_or_groups; |
| split(parsed_allowed_users_or_groups, config_str, |
| is_any_of(authorized_proxy_config_delimiter), token_compress_on); |
| unordered_set<string> allowed_users_or_groups( |
| parsed_allowed_users_or_groups.begin(), parsed_allowed_users_or_groups.end()); |
| authorized_proxy_config_map->insert({proxy_user, allowed_users_or_groups}); |
| } |
| } |
| return Status::OK(); |
| } |
| |
| bool ImpalaServer::IsCoordinator() { return is_coordinator_; } |
| |
| bool ImpalaServer::IsExecutor() { return is_executor_; } |
| |
| bool ImpalaServer::IsHealthy() { return services_started_.load(); } |
| |
| int ImpalaServer::GetThriftBackendPort() { |
| DCHECK(thrift_be_server_ != nullptr); |
| return thrift_be_server_->port(); |
| } |
| |
| TNetworkAddress ImpalaServer::GetThriftBackendAddress() { |
| return MakeNetworkAddress(FLAGS_hostname, GetThriftBackendPort()); |
| } |
| |
| int ImpalaServer::GetBeeswaxPort() { |
| DCHECK(beeswax_server_ != nullptr); |
| return beeswax_server_->port(); |
| } |
| |
| int ImpalaServer::GetHS2Port() { |
| DCHECK(hs2_server_ != nullptr); |
| return hs2_server_->port(); |
| } |
| |
| bool ImpalaServer::IsLineageLoggingEnabled() { |
| return !FLAGS_lineage_event_log_dir.empty(); |
| } |
| |
| bool ImpalaServer::AreQueryHooksEnabled() { |
| return !FLAGS_query_event_hook_classes.empty(); |
| } |
| |
| Status ImpalaServer::InitLineageLogging() { |
| if (!IsLineageLoggingEnabled()) { |
| LOG(INFO) << "Lineage logging is disabled"; |
| return Status::OK(); |
| } |
| lineage_logger_.reset(new SimpleLogger(FLAGS_lineage_event_log_dir, |
| LINEAGE_LOG_FILE_PREFIX, FLAGS_max_lineage_log_file_size)); |
| RETURN_IF_ERROR(lineage_logger_->Init()); |
| RETURN_IF_ERROR(Thread::Create("impala-server", "lineage-log-flush", |
| &ImpalaServer::LineageLoggerFlushThread, this, &lineage_logger_flush_thread_)); |
| return Status::OK(); |
| } |
| |
| bool ImpalaServer::IsAuditEventLoggingEnabled() { |
| return !FLAGS_audit_event_log_dir.empty(); |
| } |
| |
| Status ImpalaServer::InitAuditEventLogging() { |
| if (!IsAuditEventLoggingEnabled()) { |
| LOG(INFO) << "Event logging is disabled"; |
| return Status::OK(); |
| } |
| audit_event_logger_.reset(new SimpleLogger(FLAGS_audit_event_log_dir, |
| AUDIT_EVENT_LOG_FILE_PREFIX, FLAGS_max_audit_event_log_file_size)); |
| RETURN_IF_ERROR(audit_event_logger_->Init()); |
| RETURN_IF_ERROR(Thread::Create("impala-server", "audit-event-log-flush", |
| &ImpalaServer::AuditEventLoggerFlushThread, this, |
| &audit_event_logger_flush_thread_)); |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::InitProfileLogging() { |
| if (!FLAGS_log_query_to_file) return Status::OK(); |
| |
| if (FLAGS_profile_log_dir.empty()) { |
| stringstream ss; |
| ss << FLAGS_log_dir << "/profiles/"; |
| FLAGS_profile_log_dir = ss.str(); |
| } |
| profile_logger_.reset(new SimpleLogger(FLAGS_profile_log_dir, |
| PROFILE_LOG_FILE_PREFIX, FLAGS_max_profile_log_file_size, |
| FLAGS_max_profile_log_files)); |
| RETURN_IF_ERROR(profile_logger_->Init()); |
| RETURN_IF_ERROR(Thread::Create("impala-server", "log-flush-thread", |
| &ImpalaServer::LogFileFlushThread, this, &profile_log_file_flush_thread_)); |
| |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::AppendAuditEntry(const string& entry ) { |
| DCHECK(IsAuditEventLoggingEnabled()); |
| return audit_event_logger_->AppendEntry(entry); |
| } |
| |
| Status ImpalaServer::AppendLineageEntry(const string& entry ) { |
| DCHECK(IsLineageLoggingEnabled()); |
| return lineage_logger_->AppendEntry(entry); |
| } |
| |
| Status ImpalaServer::GetRuntimeProfileOutput(const TUniqueId& query_id, |
| const string& user, TRuntimeProfileFormat::type format, stringstream* output, |
| TRuntimeProfileTree* thrift_output, Document* json_output) { |
| DCHECK(output != nullptr); |
| // Search for the query id in the active query map |
| { |
| shared_ptr<ClientRequestState> request_state = GetClientRequestState(query_id); |
| if (request_state.get() != nullptr) { |
| // For queries in INITIALIZED_STATE, the profile information isn't populated yet. |
| if (request_state->operation_state() == TOperationState::INITIALIZED_STATE) { |
| return Status::Expected("Query plan is not ready."); |
| } |
| lock_guard<mutex> l(*request_state->lock()); |
| RETURN_IF_ERROR(CheckProfileAccess(user, request_state->effective_user(), |
| request_state->user_has_profile_access())); |
| if (request_state->GetCoordinator() != nullptr) { |
| UpdateExecSummary(request_state); |
| } |
| if (format == TRuntimeProfileFormat::BASE64) { |
| RETURN_IF_ERROR(request_state->profile()->SerializeToArchiveString(output)); |
| } else if (format == TRuntimeProfileFormat::THRIFT) { |
| request_state->profile()->ToThrift(thrift_output); |
| } else if (format == TRuntimeProfileFormat::JSON) { |
| request_state->profile()->ToJson(json_output); |
| } else { |
| DCHECK_EQ(format, TRuntimeProfileFormat::STRING); |
| request_state->profile()->PrettyPrint(output); |
| } |
| return Status::OK(); |
| } |
| } |
| |
| // The query was not found the active query map, search the query log. |
| { |
| lock_guard<mutex> l(query_log_lock_); |
| QueryLogIndex::const_iterator query_record = query_log_index_.find(query_id); |
| if (query_record == query_log_index_.end()) { |
| // Common error, so logging explicitly and eliding Status's stack trace. |
| string err = |
| strings::Substitute(LEGACY_INVALID_QUERY_HANDLE_TEMPLATE, PrintId(query_id)); |
| VLOG(1) << err; |
| return Status::Expected(err); |
| } |
| RETURN_IF_ERROR(CheckProfileAccess(user, query_record->second->effective_user, |
| query_record->second->user_has_profile_access)); |
| if (format == TRuntimeProfileFormat::BASE64) { |
| (*output) << query_record->second->encoded_profile_str; |
| } else if (format == TRuntimeProfileFormat::THRIFT) { |
| RETURN_IF_ERROR(RuntimeProfile::DeserializeFromArchiveString( |
| query_record->second->encoded_profile_str, thrift_output)); |
| } else if (format == TRuntimeProfileFormat::JSON) { |
| ParseResult parse_ok = json_output->Parse( |
| query_record->second->json_profile_str.c_str()); |
| // When there is an error, the json_output will stay unchanged |
| // based on rapidjson parse API |
| if (!parse_ok){ |
| string err = strings::Substitute("JSON parse error: $0 (Offset: $1)", |
| GetParseError_En(parse_ok.Code()), parse_ok.Offset()); |
| VLOG(1) << err; |
| return Status::Expected(err); |
| } |
| } else { |
| DCHECK_EQ(format, TRuntimeProfileFormat::STRING); |
| (*output) << query_record->second->profile_str; |
| } |
| } |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::GetExecSummary(const TUniqueId& query_id, const string& user, |
| TExecSummary* result) { |
| // Search for the query id in the active query map. |
| { |
| shared_ptr<ClientRequestState> request_state = GetClientRequestState(query_id); |
| if (request_state != nullptr) { |
| lock_guard<mutex> l(*request_state->lock()); |
| RETURN_IF_ERROR(CheckProfileAccess(user, request_state->effective_user(), |
| request_state->user_has_profile_access())); |
| if (request_state->operation_state() == TOperationState::PENDING_STATE) { |
| const string* admission_result = request_state->summary_profile()->GetInfoString( |
| AdmissionController::PROFILE_INFO_KEY_ADMISSION_RESULT); |
| if (admission_result != nullptr) { |
| if (*admission_result == AdmissionController::PROFILE_INFO_VAL_QUEUED) { |
| result->__set_is_queued(true); |
| const string* queued_reason = request_state->summary_profile()->GetInfoString( |
| AdmissionController::PROFILE_INFO_KEY_LAST_QUEUED_REASON); |
| if (queued_reason != nullptr) { |
| result->__set_queued_reason(*queued_reason); |
| } |
| } |
| } |
| return Status::OK(); |
| } else if (request_state->GetCoordinator() != nullptr) { |
| request_state->GetCoordinator()->GetTExecSummary(result); |
| TExecProgress progress; |
| progress.__set_num_completed_scan_ranges( |
| request_state->GetCoordinator()->progress().num_complete()); |
| progress.__set_total_scan_ranges( |
| request_state->GetCoordinator()->progress().total()); |
| // TODO: does this not need to be synchronized? |
| result->__set_progress(progress); |
| return Status::OK(); |
| } |
| } |
| } |
| |
| // Look for the query in completed query log. |
| // IMPALA-5275: Don't create Status while holding query_log_lock_ |
| { |
| string effective_user; |
| bool user_has_profile_access = false; |
| bool is_query_missing = false; |
| TExecSummary exec_summary; |
| { |
| lock_guard<mutex> l(query_log_lock_); |
| QueryLogIndex::const_iterator query_record = query_log_index_.find(query_id); |
| is_query_missing = query_record == query_log_index_.end(); |
| if (!is_query_missing) { |
| effective_user = query_record->second->effective_user; |
| user_has_profile_access = query_record->second->user_has_profile_access; |
| exec_summary = query_record->second->exec_summary; |
| } |
| } |
| if (is_query_missing) { |
| // Common error, so logging explicitly and eliding Status's stack trace. |
| string err = |
| strings::Substitute(LEGACY_INVALID_QUERY_HANDLE_TEMPLATE, PrintId(query_id)); |
| VLOG(1) << err; |
| return Status::Expected(err); |
| } |
| RETURN_IF_ERROR(CheckProfileAccess(user, effective_user, user_has_profile_access)); |
| *result = exec_summary; |
| } |
| return Status::OK(); |
| } |
| |
| [[noreturn]] void ImpalaServer::LogFileFlushThread() { |
| while (true) { |
| sleep(5); |
| const Status status = profile_logger_->Flush(); |
| if (!status.ok()) { |
| LOG(WARNING) << "Error flushing profile log: " << status.GetDetail(); |
| } |
| } |
| } |
| |
| [[noreturn]] void ImpalaServer::AuditEventLoggerFlushThread() { |
| while (true) { |
| sleep(5); |
| Status status = audit_event_logger_->Flush(); |
| if (!status.ok()) { |
| LOG(ERROR) << "Error flushing audit event log: " << status.GetDetail(); |
| if (FLAGS_abort_on_failed_audit_event) { |
| CLEAN_EXIT_WITH_ERROR("Shutting down Impala Server due to " |
| "abort_on_failed_audit_event=true"); |
| } |
| } |
| } |
| } |
| |
| [[noreturn]] void ImpalaServer::LineageLoggerFlushThread() { |
| while (true) { |
| sleep(5); |
| Status status = lineage_logger_->Flush(); |
| if (!status.ok()) { |
| LOG(ERROR) << "Error flushing lineage event log: " << status.GetDetail(); |
| if (FLAGS_abort_on_failed_lineage_event) { |
| CLEAN_EXIT_WITH_ERROR("Shutting down Impala Server due to " |
| "abort_on_failed_lineage_event=true"); |
| } |
| } |
| } |
| } |
| |
| void ImpalaServer::ArchiveQuery(const ClientRequestState& query) { |
| string encoded_profile_str; |
| Status status = query.profile()->SerializeToArchiveString(&encoded_profile_str); |
| if (!status.ok()) { |
| // Didn't serialize the string. Continue with empty string. |
| LOG_EVERY_N(WARNING, 1000) << "Could not serialize profile to archive string " |
| << status.GetDetail(); |
| return; |
| } |
| |
| // If there was an error initialising archival (e.g. directory is not writeable), |
| // FLAGS_log_query_to_file will have been set to false |
| if (FLAGS_log_query_to_file) { |
| stringstream ss; |
| ss << UnixMillis() << " " << PrintId(query.query_id()) << " " << encoded_profile_str; |
| status = profile_logger_->AppendEntry(ss.str()); |
| if (!status.ok()) { |
| LOG_EVERY_N(WARNING, 1000) << "Could not write to profile log file file (" |
| << google::COUNTER << " attempts failed): " |
| << status.GetDetail(); |
| LOG_EVERY_N(WARNING, 1000) |
| << "Disable query logging with --log_query_to_file=false"; |
| } |
| } |
| |
| if (FLAGS_query_log_size == 0) return; |
| QueryStateRecord record(query, true, encoded_profile_str); |
| if (query.GetCoordinator() != nullptr) |
| query.GetCoordinator()->GetTExecSummary(&record.exec_summary); |
| { |
| lock_guard<mutex> l(query_log_lock_); |
| // Add record to the beginning of the log, and to the lookup index. |
| query_log_index_[query.query_id()] = query_log_.insert(query_log_.begin(), record); |
| |
| if (FLAGS_query_log_size > -1 && FLAGS_query_log_size < query_log_.size()) { |
| DCHECK_EQ(query_log_.size() - FLAGS_query_log_size, 1); |
| query_log_index_.erase(query_log_.back().id); |
| query_log_.pop_back(); |
| } |
| } |
| } |
| |
| ImpalaServer::~ImpalaServer() {} |
| |
| void ImpalaServer::AddPoolConfiguration(TQueryCtx* ctx, |
| const QueryOptionsMask& override_options_mask) { |
| // Errors are not returned and are only logged (at level 2) because some incoming |
| // requests are not expected to be mapped to a pool and will not have query options, |
| // e.g. 'use [db];'. For requests that do need to be mapped to a pool successfully, the |
| // pool is resolved again during scheduling and errors are handled at that point. |
| string resolved_pool; |
| Status status = exec_env_->request_pool_service()->ResolveRequestPool(*ctx, |
| &resolved_pool); |
| if (!status.ok()) { |
| VLOG_RPC << "Not adding pool query options for query=" << PrintId(ctx->query_id) |
| << " ResolveRequestPool status: " << status.GetDetail(); |
| return; |
| } |
| ctx->__set_request_pool(resolved_pool); |
| |
| TPoolConfig config; |
| status = exec_env_->request_pool_service()->GetPoolConfig(resolved_pool, &config); |
| if (!status.ok()) { |
| VLOG_RPC << "Not adding pool query options for query=" << PrintId(ctx->query_id) |
| << " GetConfigPool status: " << status.GetDetail(); |
| return; |
| } |
| |
| TQueryOptions pool_options; |
| QueryOptionsMask set_pool_options_mask; |
| status = ParseQueryOptions(config.default_query_options, &pool_options, |
| &set_pool_options_mask); |
| if (!status.ok()) { |
| VLOG_QUERY << "Ignoring errors while parsing default query options for pool=" |
| << resolved_pool << ", message: " << status.GetDetail(); |
| } |
| |
| QueryOptionsMask overlay_mask = override_options_mask & set_pool_options_mask; |
| VLOG_RPC << "Parsed pool options: " << DebugQueryOptions(pool_options) |
| << " override_options_mask=" << override_options_mask.to_string() |
| << " set_pool_mask=" << set_pool_options_mask.to_string() |
| << " overlay_mask=" << overlay_mask.to_string(); |
| OverlayQueryOptions(pool_options, overlay_mask, &ctx->client_request.query_options); |
| |
| status = ValidateQueryOptions(&pool_options); |
| if (!status.ok()) { |
| VLOG_QUERY << "Ignoring errors while validating default query options for pool=" |
| << resolved_pool << ", message: " << status.GetDetail(); |
| } |
| } |
| |
| Status ImpalaServer::Execute(TQueryCtx* query_ctx, |
| shared_ptr<SessionState> session_state, |
| shared_ptr<ClientRequestState>* request_state) { |
| PrepareQueryContext(query_ctx); |
| ScopedThreadContext debug_ctx(GetThreadDebugInfo(), query_ctx->query_id); |
| ImpaladMetrics::IMPALA_SERVER_NUM_QUERIES->Increment(1L); |
| |
| // Redact the SQL stmt and update the query context |
| string stmt = replace_all_copy(query_ctx->client_request.stmt, "\n", " "); |
| Redact(&stmt); |
| query_ctx->client_request.__set_redacted_stmt((const string) stmt); |
| |
| bool registered_request_state; |
| Status status = ExecuteInternal(*query_ctx, session_state, ®istered_request_state, |
| request_state); |
| if (!status.ok() && registered_request_state) { |
| discard_result(UnregisterQuery((*request_state)->query_id(), false, &status)); |
| } |
| return status; |
| } |
| |
| Status ImpalaServer::ExecuteInternal( |
| const TQueryCtx& query_ctx, |
| shared_ptr<SessionState> session_state, |
| bool* registered_request_state, |
| shared_ptr<ClientRequestState>* request_state) { |
| DCHECK(session_state != nullptr); |
| *registered_request_state = false; |
| |
| request_state->reset(new ClientRequestState(query_ctx, exec_env_, exec_env_->frontend(), |
| this, session_state)); |
| |
| (*request_state)->query_events()->MarkEvent("Query submitted"); |
| |
| TExecRequest result; |
| { |
| // Keep a lock on request_state so that registration and setting |
| // result_metadata are atomic. |
| lock_guard<mutex> l(*(*request_state)->lock()); |
| |
| // register exec state as early as possible so that queries that |
| // take a long time to plan show up, and to handle incoming status |
| // reports before execution starts. |
| RETURN_IF_ERROR(RegisterQuery(session_state, *request_state)); |
| *registered_request_state = true; |
| |
| #ifndef NDEBUG |
| // Inject a sleep to simulate metadata loading pauses for tables. This |
| // is only used for testing. |
| if (FLAGS_stress_metadata_loading_pause_injection_ms > 0) { |
| SleepForMs(FLAGS_stress_metadata_loading_pause_injection_ms); |
| } |
| #endif |
| |
| size_t statement_length = query_ctx.client_request.stmt.length(); |
| int32_t max_statement_length = |
| query_ctx.client_request.query_options.max_statement_length_bytes; |
| if (max_statement_length > 0 && statement_length > max_statement_length) { |
| return Status(ErrorMsg(TErrorCode::MAX_STATEMENT_LENGTH_EXCEEDED, |
| statement_length, max_statement_length)); |
| } |
| |
| RETURN_IF_ERROR((*request_state)->UpdateQueryStatus( |
| exec_env_->frontend()->GetExecRequest(query_ctx, &result))); |
| |
| (*request_state)->query_events()->MarkEvent("Planning finished"); |
| (*request_state)->set_user_profile_access(result.user_has_profile_access); |
| (*request_state)->summary_profile()->AddEventSequence( |
| result.timeline.name, result.timeline); |
| (*request_state)->SetFrontendProfile(result.profile); |
| if (result.__isset.result_set_metadata) { |
| (*request_state)->set_result_metadata(result.result_set_metadata); |
| } |
| } |
| VLOG(2) << "Execution request: " << ThriftDebugString(result); |
| |
| // start execution of query; also starts fragment status reports |
| RETURN_IF_ERROR((*request_state)->Exec(&result)); |
| Status status = UpdateCatalogMetrics(); |
| if (!status.ok()) { |
| VLOG_QUERY << "Couldn't update catalog metrics: " << status.GetDetail(); |
| } |
| return Status::OK(); |
| } |
| |
| void ImpalaServer::PrepareQueryContext(TQueryCtx* query_ctx) { |
| PrepareQueryContext(GetThriftBackendAddress(), |
| ExecEnv::GetInstance()->krpc_address(), query_ctx); |
| } |
| |
| void ImpalaServer::PrepareQueryContext(const TNetworkAddress& backend_addr, |
| const TNetworkAddress& krpc_addr, TQueryCtx* query_ctx) { |
| query_ctx->__set_pid(getpid()); |
| int64_t now_us = UnixMicros(); |
| const Timezone& utc_tz = TimezoneDatabase::GetUtcTimezone(); |
| // Fill in query options with default timezone so it is visible in "SET" command, |
| // profiles, etc. |
| if (query_ctx->client_request.query_options.timezone.empty()) { |
| query_ctx->client_request.query_options.timezone = TimezoneDatabase::LocalZoneName(); |
| } |
| string local_tz_name = query_ctx->client_request.query_options.timezone; |
| const Timezone* local_tz = TimezoneDatabase::FindTimezone(local_tz_name); |
| if (local_tz != nullptr) { |
| LOG(INFO) << "Found local timezone \"" << local_tz_name << "\"."; |
| } else { |
| LOG(ERROR) << "Failed to find local timezone \"" << local_tz_name |
| << "\". Falling back to UTC"; |
| local_tz_name = "UTC"; |
| local_tz = &utc_tz; |
| } |
| query_ctx->__set_utc_timestamp_string(ToStringFromUnixMicros(now_us, utc_tz)); |
| if (query_ctx->client_request.query_options.now_string.empty()) { |
| query_ctx->__set_now_string(ToStringFromUnixMicros(now_us, *local_tz)); |
| } else { |
| // For testing purposes |
| query_ctx->__set_now_string(query_ctx->client_request.query_options.now_string); |
| } |
| query_ctx->__set_start_unix_millis(now_us / MICROS_PER_MILLI); |
| query_ctx->__set_coord_address(backend_addr); |
| query_ctx->__set_coord_krpc_address(krpc_addr); |
| query_ctx->__set_local_time_zone(local_tz_name); |
| query_ctx->__set_status_report_interval_ms(FLAGS_status_report_interval_ms); |
| query_ctx->__set_status_report_max_retry_s(FLAGS_status_report_max_retry_s); |
| |
| // Creating a random_generator every time is not free, but |
| // benchmarks show it to be slightly cheaper than contending for a |
| // single generator under a lock (since random_generator is not |
| // thread-safe). |
| // TODO: as cleanup we should consolidate this with uuid_generator_ - there's no reason |
| // to have two different methods to achieve the same end. To address the scalability |
| // concern we could shard the RNG or similar. |
| query_ctx->query_id = UuidToQueryId(random_generator()()); |
| GetThreadDebugInfo()->SetQueryId(query_ctx->query_id); |
| |
| const double trace_ratio = query_ctx->client_request.query_options.resource_trace_ratio; |
| if (trace_ratio > 0 && rng_.NextDoubleFraction() < trace_ratio) { |
| query_ctx->__set_trace_resource_usage(true); |
| } |
| } |
| |
| Status ImpalaServer::RegisterQuery(shared_ptr<SessionState> session_state, |
| const shared_ptr<ClientRequestState>& request_state) { |
| lock_guard<mutex> l2(session_state->lock); |
| // The session wasn't expired at the time it was checked out and it isn't allowed to |
| // expire while checked out, so it must not be expired. |
| DCHECK(session_state->ref_count > 0 && !session_state->expired); |
| // The session may have been closed after it was checked out. |
| if (session_state->closed) { |
| VLOG(1) << "RegisterQuery(): session has been closed, ignoring query."; |
| return Status::Expected("Session has been closed, ignoring query."); |
| } |
| const TUniqueId& query_id = request_state->query_id(); |
| { |
| DCHECK_EQ(this, ExecEnv::GetInstance()->impala_server()); |
| ScopedShardedMapRef<std::shared_ptr<ClientRequestState>> map_ref(query_id, |
| &client_request_state_map_); |
| DCHECK(map_ref.get() != nullptr); |
| |
| auto entry = map_ref->find(query_id); |
| if (entry != map_ref->end()) { |
| // There shouldn't be an active query with that same id. |
| // (query_id is globally unique) |
| stringstream ss; |
| ss << "query id " << PrintId(query_id) << " already exists"; |
| return Status(ErrorMsg(TErrorCode::INTERNAL_ERROR, ss.str())); |
| } |
| map_ref->insert(make_pair(query_id, request_state)); |
| } |
| // Metric is decremented in UnregisterQuery(). |
| ImpaladMetrics::NUM_QUERIES_REGISTERED->Increment(1L); |
| VLOG_QUERY << "Registered query query_id=" << PrintId(query_id) |
| << " session_id=" << PrintId(request_state->session_id()); |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::SetQueryInflight(shared_ptr<SessionState> session_state, |
| const shared_ptr<ClientRequestState>& request_state) { |
| const TUniqueId& query_id = request_state->query_id(); |
| lock_guard<mutex> l(session_state->lock); |
| // The session wasn't expired at the time it was checked out and it isn't allowed to |
| // expire while checked out, so it must not be expired. |
| DCHECK_GT(session_state->ref_count, 0); |
| DCHECK(!session_state->expired); |
| // The session may have been closed after it was checked out. |
| if (session_state->closed) { |
| VLOG(1) << "Session closed: cannot set " << PrintId(query_id) << " in-flight"; |
| return Status::Expected("Session closed"); |
| } |
| // Add query to the set that will be unregistered if sesssion is closed. |
| session_state->inflight_queries.insert(query_id); |
| ++session_state->total_queries; |
| |
| // If the query has a timeout or time limit, schedule checks. |
| int32_t idle_timeout_s = request_state->query_options().query_timeout_s; |
| if (FLAGS_idle_query_timeout > 0 && idle_timeout_s > 0) { |
| idle_timeout_s = min(FLAGS_idle_query_timeout, idle_timeout_s); |
| } else { |
| // Use a non-zero timeout, if one exists |
| idle_timeout_s = max(FLAGS_idle_query_timeout, idle_timeout_s); |
| } |
| int32_t exec_time_limit_s = request_state->query_options().exec_time_limit_s; |
| int64_t cpu_limit_s = request_state->query_options().cpu_limit_s; |
| int64_t scan_bytes_limit = request_state->query_options().scan_bytes_limit; |
| if (idle_timeout_s > 0 || exec_time_limit_s > 0 || |
| cpu_limit_s > 0 || scan_bytes_limit > 0) { |
| lock_guard<mutex> l2(query_expiration_lock_); |
| int64_t now = UnixMillis(); |
| if (idle_timeout_s > 0) { |
| VLOG_QUERY << "Query " << PrintId(query_id) << " has idle timeout of " |
| << PrettyPrinter::Print(idle_timeout_s, TUnit::TIME_S); |
| queries_by_timestamp_.emplace(ExpirationEvent{ |
| now + (1000L * idle_timeout_s), query_id, ExpirationKind::IDLE_TIMEOUT}); |
| } |
| if (exec_time_limit_s > 0) { |
| VLOG_QUERY << "Query " << PrintId(query_id) << " has execution time limit of " |
| << PrettyPrinter::Print(exec_time_limit_s, TUnit::TIME_S); |
| queries_by_timestamp_.emplace(ExpirationEvent{ |
| now + (1000L * exec_time_limit_s), query_id, ExpirationKind::EXEC_TIME_LIMIT}); |
| } |
| if (cpu_limit_s > 0 || scan_bytes_limit > 0) { |
| if (cpu_limit_s > 0) { |
| VLOG_QUERY << "Query " << PrintId(query_id) << " has CPU limit of " |
| << PrettyPrinter::Print(cpu_limit_s, TUnit::TIME_S); |
| } |
| if (scan_bytes_limit > 0) { |
| VLOG_QUERY << "Query " << PrintId(query_id) << " has scan bytes limit of " |
| << PrettyPrinter::Print(scan_bytes_limit, TUnit::BYTES); |
| } |
| queries_by_timestamp_.emplace(ExpirationEvent{ |
| now + EXPIRATION_CHECK_INTERVAL_MS, query_id, ExpirationKind::RESOURCE_LIMIT}); |
| } |
| } |
| return Status::OK(); |
| } |
| |
| void ImpalaServer::UpdateExecSummary( |
| std::shared_ptr<ClientRequestState> request_state) const { |
| DCHECK(request_state->GetCoordinator() != nullptr); |
| TExecSummary t_exec_summary; |
| request_state->GetCoordinator()->GetTExecSummary(&t_exec_summary); |
| request_state->summary_profile()->SetTExecSummary(t_exec_summary); |
| string exec_summary = PrintExecSummary(t_exec_summary); |
| request_state->summary_profile()->AddInfoStringRedacted("ExecSummary", exec_summary); |
| request_state->summary_profile()->AddInfoStringRedacted("Errors", |
| request_state->GetCoordinator()->GetErrorLog()); |
| } |
| |
| Status ImpalaServer::UnregisterQuery(const TUniqueId& query_id, bool check_inflight, |
| const Status* cause) { |
| VLOG_QUERY << "UnregisterQuery(): query_id=" << PrintId(query_id); |
| |
| RETURN_IF_ERROR(CancelInternal(query_id, check_inflight, cause)); |
| |
| shared_ptr<ClientRequestState> request_state; |
| { |
| DCHECK_EQ(this, ExecEnv::GetInstance()->impala_server()); |
| ScopedShardedMapRef<std::shared_ptr<ClientRequestState>> map_ref(query_id, |
| &client_request_state_map_); |
| DCHECK(map_ref.get() != nullptr); |
| |
| auto entry = map_ref->find(query_id); |
| if (entry == map_ref->end()) { |
| VLOG(1) << "Invalid or unknown query handle " << PrintId(query_id); |
| return Status::Expected("Invalid or unknown query handle"); |
| } else { |
| request_state = entry->second; |
| } |
| map_ref->erase(entry); |
| } |
| |
| request_state->Done(); |
| |
| int64_t duration_us = request_state->end_time_us() - request_state->start_time_us(); |
| int64_t duration_ms = duration_us / MICROS_PER_MILLI; |
| |
| // duration_ms can be negative when the local timezone changes during query execution. |
| if (duration_ms >= 0) { |
| if (request_state->stmt_type() == TStmtType::DDL) { |
| ImpaladMetrics::DDL_DURATIONS->Update(duration_ms); |
| } else { |
| ImpaladMetrics::QUERY_DURATIONS->Update(duration_ms); |
| } |
| } |
| { |
| lock_guard<mutex> l(request_state->session()->lock); |
| request_state->session()->inflight_queries.erase(query_id); |
| } |
| |
| if (request_state->GetCoordinator() != nullptr) { |
| UpdateExecSummary(request_state); |
| } |
| |
| if (request_state->schedule() != nullptr) { |
| const PerBackendExecParams& per_backend_params = |
| request_state->schedule()->per_backend_exec_params(); |
| if (!per_backend_params.empty()) { |
| lock_guard<mutex> l(query_locations_lock_); |
| for (const auto& entry : per_backend_params) { |
| const TNetworkAddress& hostport = entry.first; |
| // Query may have been removed already by cancellation path. In particular, if |
| // node to fail was last sender to an exchange, the coordinator will realise and |
| // fail the query at the same time the failure detection path does the same |
| // thing. They will harmlessly race to remove the query from this map. |
| QueryLocations::iterator it = query_locations_.find(hostport); |
| if (it != query_locations_.end()) { |
| it->second.erase(request_state->query_id()); |
| } |
| } |
| } |
| } |
| ArchiveQuery(*request_state); |
| ImpaladMetrics::NUM_QUERIES_REGISTERED->Increment(-1L); |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::UpdateCatalogMetrics() { |
| TGetCatalogMetricsResult metrics; |
| RETURN_IF_ERROR(exec_env_->frontend()->GetCatalogMetrics(&metrics)); |
| ImpaladMetrics::CATALOG_NUM_DBS->SetValue(metrics.num_dbs); |
| ImpaladMetrics::CATALOG_NUM_TABLES->SetValue(metrics.num_tables); |
| if (!FLAGS_use_local_catalog) return Status::OK(); |
| DCHECK(metrics.__isset.cache_eviction_count); |
| DCHECK(metrics.__isset.cache_hit_count); |
| DCHECK(metrics.__isset.cache_load_count); |
| DCHECK(metrics.__isset.cache_load_exception_count); |
| DCHECK(metrics.__isset.cache_load_success_count); |
| DCHECK(metrics.__isset.cache_miss_count); |
| DCHECK(metrics.__isset.cache_request_count); |
| DCHECK(metrics.__isset.cache_total_load_time); |
| DCHECK(metrics.__isset.cache_avg_load_time); |
| DCHECK(metrics.__isset.cache_hit_rate); |
| DCHECK(metrics.__isset.cache_load_exception_rate); |
| DCHECK(metrics.__isset.cache_miss_rate); |
| ImpaladMetrics::CATALOG_CACHE_EVICTION_COUNT->SetValue(metrics.cache_eviction_count); |
| ImpaladMetrics::CATALOG_CACHE_HIT_COUNT->SetValue(metrics.cache_hit_count); |
| ImpaladMetrics::CATALOG_CACHE_LOAD_COUNT->SetValue(metrics.cache_load_count); |
| ImpaladMetrics::CATALOG_CACHE_LOAD_EXCEPTION_COUNT->SetValue( |
| metrics.cache_load_exception_count); |
| ImpaladMetrics::CATALOG_CACHE_LOAD_SUCCESS_COUNT->SetValue( |
| metrics.cache_load_success_count); |
| ImpaladMetrics::CATALOG_CACHE_MISS_COUNT->SetValue(metrics.cache_miss_count); |
| ImpaladMetrics::CATALOG_CACHE_REQUEST_COUNT->SetValue(metrics.cache_request_count); |
| ImpaladMetrics::CATALOG_CACHE_TOTAL_LOAD_TIME->SetValue(metrics.cache_total_load_time); |
| ImpaladMetrics::CATALOG_CACHE_AVG_LOAD_TIME->SetValue(metrics.cache_avg_load_time); |
| ImpaladMetrics::CATALOG_CACHE_HIT_RATE->SetValue(metrics.cache_hit_rate); |
| ImpaladMetrics::CATALOG_CACHE_LOAD_EXCEPTION_RATE->SetValue( |
| metrics.cache_load_exception_rate); |
| ImpaladMetrics::CATALOG_CACHE_MISS_RATE->SetValue(metrics.cache_miss_rate); |
| return Status::OK(); |
| |
| } |
| |
| Status ImpalaServer::CancelInternal(const TUniqueId& query_id, bool check_inflight, |
| const Status* cause) { |
| VLOG_QUERY << "Cancel(): query_id=" << PrintId(query_id); |
| shared_ptr<ClientRequestState> request_state = GetClientRequestState(query_id); |
| if (request_state == nullptr) { |
| return Status::Expected("Invalid or unknown query handle"); |
| } |
| RETURN_IF_ERROR(request_state->Cancel(check_inflight, cause)); |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::CloseSessionInternal(const TUniqueId& session_id, |
| const SecretArg& secret, bool ignore_if_absent) { |
| DCHECK(secret.is_session_secret()); |
| VLOG_QUERY << "Closing session: " << PrintId(session_id); |
| |
| // Find the session_state and remove it from the map. |
| shared_ptr<SessionState> session_state; |
| { |
| lock_guard<mutex> l(session_state_map_lock_); |
| SessionStateMap::iterator entry = session_state_map_.find(session_id); |
| if (entry == session_state_map_.end() || !secret.Validate(entry->second->secret)) { |
| if (ignore_if_absent) { |
| return Status::OK(); |
| } else { |
| if (entry != session_state_map_.end()) { |
| // Log invalid attempts to connect. Be careful not to log secret. |
| VLOG(1) << "Client tried to connect to session " << PrintId(session_id) |
| << " with invalid secret."; |
| } |
| string err_msg = Substitute("Invalid session id: $0", PrintId(session_id)); |
| VLOG(1) << "CloseSessionInternal(): " << err_msg; |
| return Status::Expected(err_msg); |
| } |
| } |
| session_state = entry->second; |
| session_state_map_.erase(session_id); |
| } |
| DCHECK(session_state != nullptr); |
| if (session_state->session_type == TSessionType::BEESWAX) { |
| ImpaladMetrics::IMPALA_SERVER_NUM_OPEN_BEESWAX_SESSIONS->Increment(-1L); |
| } else { |
| ImpaladMetrics::IMPALA_SERVER_NUM_OPEN_HS2_SESSIONS->Increment(-1L); |
| } |
| unordered_set<TUniqueId> inflight_queries; |
| { |
| lock_guard<mutex> l(session_state->lock); |
| DCHECK(!session_state->closed); |
| session_state->closed = true; |
| // Since closed is true, no more queries will be added to the inflight list. |
| inflight_queries.insert(session_state->inflight_queries.begin(), |
| session_state->inflight_queries.end()); |
| } |
| // Unregister all open queries from this session. |
| Status status = Status::Expected("Session closed"); |
| for (const TUniqueId& query_id: inflight_queries) { |
| // TODO: deal with an error status |
| discard_result(UnregisterQuery(query_id, false, &status)); |
| } |
| // Reconfigure the poll period of session_maintenance_thread_ if necessary. |
| UnregisterSessionTimeout(session_state->session_timeout); |
| VLOG_QUERY << "Closed session: " << PrintId(session_id); |
| return Status::OK(); |
| } |
| |
| Status ImpalaServer::GetSessionState(const TUniqueId& session_id, const SecretArg& secret, |
| shared_ptr<SessionState>* session_state, bool mark_active) { |
| lock_guard<mutex> l(session_state_map_lock_); |
| SessionStateMap::iterator i = session_state_map_.find(session_id); |
| // TODO: consider factoring out the lookup and secret validation into a separate method. |
| // This would require rethinking the locking protocol for 'session_state_map_lock_' - |
| // it probably doesn't not need to be held for the full duration of this function. |
| if (i == session_state_map_.end() || !secret.Validate(i->second->secret)) { |
| if (i != session_state_map_.end()) { |
| // Log invalid attempts to connect. Be careful not to log secret. |
| VLOG(1) << "Client tried to connect to session " << PrintId(session_id) |
| << " with invalid " |
| << (secret.is_session_secret() ? "session" : "operation") << " secret."; |
| } |
| *session_state = std::shared_ptr<SessionState>(); |
| string err_msg = secret.is_session_secret() ? |
| Substitute("Invalid session id: $0", PrintId(session_id)) : |
| Substitute(LEGACY_INVALID_QUERY_HANDLE_TEMPLATE, PrintId(secret.query_id())); |
| VLOG(1) << "GetSessionState(): " << err_msg; |
| return Status::Expected(err_msg); |
| } else { |
| if (mark_active) { |
| lock_guard<mutex> session_lock(i->second->lock); |
| if (i->second->expired) { |
| stringstream ss; |
| ss << "Client session expired due to more than " << i->second->session_timeout |
| << "s of inactivity (last activity was at: " |
| << ToStringFromUnixMillis(i->second->last_accessed_ms) << ")."; |
| return Status::Expected(ss.str()); |
| } |
| if (i->second->closed) { |
| VLOG(1) << "GetSessionState(): session " << PrintId(session_id) << " is closed."; |
| return Status::Expected("Session is closed"); |
| } |
| ++i->second->ref_count; |
| } |
| *session_state = i->second; |
| return Status::OK(); |
| } |
| } |
| |
| void ImpalaServer::InitializeConfigVariables() { |
| // Set idle_session_timeout here to let the SET command return the value of |
| // the command line option FLAGS_idle_session_timeout |
| default_query_options_.__set_idle_session_timeout(FLAGS_idle_session_timeout); |
| QueryOptionsMask set_query_options; // unused |
| Status status = ParseQueryOptions(FLAGS_default_query_options, |
| &default_query_options_, &set_query_options); |
| status.MergeStatus(ValidateQueryOptions(&default_query_options_)); |
| if (!status.ok()) { |
| // Log error and exit if the default query options are invalid. |
| CLEAN_EXIT_WITH_ERROR(Substitute("Invalid default query options. Please check " |
| "-default_query_options.\n $0", status.GetDetail())); |
| } |
| LOG(INFO) << "Default query options:" << ThriftDebugString(default_query_options_); |
| |
| map<string, string> string_map; |
| TQueryOptionsToMap(default_query_options_, &string_map); |
| string_map["SUPPORT_START_OVER"] = "false"; |
| string_map["TIMEZONE"] = TimezoneDatabase::LocalZoneName(); |
| PopulateQueryOptionLevels(&query_option_levels_); |
| map<string, string>::const_iterator itr = string_map.begin(); |
| for (; itr != string_map.end(); ++itr) { |
| ConfigVariable option; |
| option.__set_key(itr->first); |
| option.__set_value(itr->second); |
| AddOptionLevelToConfig(&option, itr->first); |
| default_configs_.push_back(option); |
| } |
| } |
| |
| void ImpalaServer::SessionState::UpdateTimeout() { |
| DCHECK(impala_server != nullptr); |
| int32_t old_timeout = session_timeout; |
| if (set_query_options.__isset.idle_session_timeout) { |
| session_timeout = set_query_options.idle_session_timeout; |
| } else { |
| session_timeout = server_default_query_options->idle_session_timeout; |
| } |
| if (old_timeout != session_timeout) { |
| impala_server->UnregisterSessionTimeout(old_timeout); |
| impala_server->RegisterSessionTimeout(session_timeout); |
| } |
| } |
| |
| void ImpalaServer::AddOptionLevelToConfig(ConfigVariable* config, |
| const string& option_key) const { |
| const auto query_option_level = query_option_levels_.find(option_key); |
| DCHECK(query_option_level != query_option_levels_.end()); |
| config->__set_level(query_option_level->second); |
| } |
| |
| void ImpalaServer::SessionState::ToThrift(const TUniqueId& session_id, |
| TSessionState* state) { |
| lock_guard<mutex> l(lock); |
| state->session_id = session_id; |
| state->session_type = session_type; |
| state->database = database; |
| state->connected_user = connected_user; |
| // The do_as_user will only be set if delegation is enabled and the |
| // proxy user is authorized to delegate as this user. |
| if (!do_as_user.empty()) state->__set_delegated_user(do_as_user); |
| state->network_address = network_address; |
| state->__set_kudu_latest_observed_ts(kudu_latest_observed_ts); |
| } |
| |
| TQueryOptions ImpalaServer::SessionState::QueryOptions() { |
| TQueryOptions ret = *server_default_query_options; |
| OverlayQueryOptions(set_query_options, set_query_options_mask, &ret); |
| return ret; |
| } |
| |
| void ImpalaServer::CancelFromThreadPool(uint32_t thread_id, |
| const CancellationWork& cancellation_work) { |
| const TUniqueId& query_id = cancellation_work.query_id(); |
| shared_ptr<ClientRequestState> request_state = GetClientRequestState(query_id); |
| // Query was already unregistered. |
| if (request_state == nullptr) { |
| VLOG_QUERY << "CancelFromThreadPool(): query " << PrintId(query_id) |
| << " already unregistered."; |
| return; |
| } |
| |
| DebugActionNoFail(request_state->query_options(), "QUERY_CANCELLATION_THREAD"); |
| Status error; |
| switch (cancellation_work.cause()) { |
| case CancellationWorkCause::TERMINATED_BY_SERVER: |
| error = cancellation_work.error(); |
| break; |
| case CancellationWorkCause::BACKEND_FAILED: { |
| // We only want to proceed with cancellation if the backends are still in use for |
| // the query. |
| vector<TNetworkAddress> active_backends; |
| Coordinator* coord = request_state->GetCoordinator(); |
| if (coord == nullptr) { |
| // Query hasn't started yet - it still will run on all backends. |
| active_backends = cancellation_work.failed_backends(); |
| } else { |
| active_backends = coord->GetActiveBackends(cancellation_work.failed_backends()); |
| } |
| if (active_backends.empty()) { |
| VLOG_QUERY << "CancelFromThreadPool(): all failed backends already completed for " |
| << "query " << PrintId(query_id); |
| return; |
| } |
| stringstream msg; |
| for (int i = 0; i < active_backends.size(); ++i) { |
| msg << TNetworkAddressToString(active_backends[i]); |
| if (i + 1 != active_backends.size()) msg << ", "; |
| } |
| error = Status::Expected(TErrorCode::UNREACHABLE_IMPALADS, msg.str()); |
| break; |
| } |
| default: |
| DCHECK(false) << static_cast<int>(cancellation_work.cause()); |
| } |
| |
| if (cancellation_work.unregister()) { |
| Status status = UnregisterQuery(cancellation_work.query_id(), true, &error); |
| if (!status.ok()) { |
| VLOG_QUERY << "Query de-registration (" << PrintId(cancellation_work.query_id()) |
| << ") failed"; |
| } |
| } else { |
| VLOG_QUERY << "CancelFromThreadPool(): cancelling query_id=" << PrintId(query_id); |
| Status status = request_state->Cancel(true, &error); |
| if (!status.ok()) { |
| VLOG_QUERY << "Query cancellation (" << PrintId(cancellation_work.query_id()) |
| << ") did not succeed: " << status.GetDetail(); |
| } |
| } |
| } |
| |
| Status ImpalaServer::AuthorizeProxyUser(const string& user, const string& do_as_user) { |
| if (user.empty()) { |
| const string err_msg("Unable to delegate using empty proxy username."); |
| VLOG(1) << err_msg; |
| return Status::Expected(err_msg); |
| } else if (do_as_user.empty()) { |
| const string err_msg("Unable to delegate using empty doAs username."); |
| VLOG(1) << err_msg; |
| return Status::Expected(err_msg); |
| } |
| |
| stringstream error_msg; |
| error_msg << "User '" << user << "' is not authorized to delegate to '" |
| << do_as_user << "'."; |
| if (authorized_proxy_user_config_.size() == 0 && |
| authorized_proxy_group_config_.size() == 0) { |
| error_msg << " User/group delegation is disabled."; |
| string error_msg_str = error_msg.str(); |
| VLOG(1) << error_msg_str; |
| return Status::Expected(error_msg_str); |
| } |
| |
| // Get the short version of the user name (the user name up to the first '/' or '@') |
| // from the full principal name. |
| size_t end_idx = min(user.find("/"), user.find("@")); |
| // If neither are found (or are found at the beginning of the user name), |
| // return the username. Otherwise, return the username up to the matching character. |
| string short_user( |
| end_idx == string::npos || end_idx == 0 ? user : user.substr(0, end_idx)); |
| |
| // Check if the proxy user exists. If he/she does, then check if they are allowed |
| // to delegate to the do_as_user. |
| AuthorizedProxyMap::const_iterator proxy_user = |
| authorized_proxy_user_config_.find(short_user); |
| if (proxy_user != authorized_proxy_user_config_.end()) { |
| boost::unordered_set<string> users = proxy_user->second; |
| if (users.find("*") != users.end() || |
| users.find(do_as_user) != users.end()) { |
| return Status::OK(); |
| } |
| } |
| |
| if (authorized_proxy_group_config_.size() > 0) { |
| // Check if the groups of do_as_user are in the authorized proxy groups. |
| AuthorizedProxyMap::const_iterator proxy_group = |
| authorized_proxy_group_config_.find(short_user); |
| if (proxy_group != authorized_proxy_group_config_.end()) { |
| boost::unordered_set<string> groups = proxy_group->second; |
| if (groups.find("*") != groups.end()) return Status::OK(); |
| |
| TGetHadoopGroupsRequest req; |
| req.__set_user(do_as_user); |
| TGetHadoopGroupsResponse res; |
| int64_t start = MonotonicMillis(); |
| Status status = exec_env_->frontend()->GetHadoopGroups(req, &res); |
| VLOG_QUERY << "Getting Hadoop groups for user: " << short_user << " took " << |
| (PrettyPrinter::Print(MonotonicMillis() - start, TUnit::TIME_MS)); |
| if (!status.ok()) { |
| LOG(ERROR) << "Error getting Hadoop groups for user: " << short_user << ": " |
| << status.GetDetail(); |
| return status; |
| } |
| |
| for (const string& do_as_group : res.groups) { |
| if (groups.find(do_as_group) != groups.end()) { |
| return Status::OK(); |
| } |
| } |
| } |
| } |
| |
| string error_msg_str = error_msg.str(); |
| VLOG(1) << error_msg_str; |
| return Status::Expected(error_msg_str); |
| } |
| |
| void ImpalaServer::CatalogUpdateVersionInfo::UpdateCatalogVersionMetrics() |
| { |
| ImpaladMetrics::CATALOG_VERSION->SetValue(catalog_version); |
| ImpaladMetrics::CATALOG_OBJECT_VERSION_LOWER_BOUND->SetValue( |
| catalog_object_version_lower_bound); |
| ImpaladMetrics::CATALOG_TOPIC_VERSION->SetValue(catalog_topic_version); |
| ImpaladMetrics::CATALOG_SERVICE_ID->SetValue(PrintId(catalog_service_id)); |
| } |
| |
| void ImpalaServer::CatalogUpdateCallback( |
| const StatestoreSubscriber::TopicDeltaMap& incoming_topic_deltas, |
| vector<TTopicDelta>* subscriber_topic_updates) { |
| StatestoreSubscriber::TopicDeltaMap::const_iterator topic = |
| incoming_topic_deltas.find(CatalogServer::IMPALA_CATALOG_TOPIC); |
| if (topic == incoming_topic_deltas.end()) return; |
| const TTopicDelta& delta = topic->second; |
| TopicItemSpanIterator callback_ctx (delta.topic_entries, FLAGS_compact_catalog_topic); |
| |
| TUpdateCatalogCacheRequest req; |
| req.__set_is_delta(delta.is_delta); |
| req.__set_native_iterator_ptr(reinterpret_cast<int64_t>(&callback_ctx)); |
| TUpdateCatalogCacheResponse resp; |
| Status s = exec_env_->frontend()->UpdateCatalogCache(req, &resp); |
| if (!s.ok()) { |
| LOG(ERROR) << "There was an error processing the impalad catalog update. Requesting" |
| << " a full topic update to recover: " << s.GetDetail(); |
| subscriber_topic_updates->emplace_back(); |
| TTopicDelta& update = subscriber_topic_updates->back(); |
| update.topic_name = CatalogServer::IMPALA_CATALOG_TOPIC; |
| update.__set_from_version(0L); |
| ImpaladMetrics::CATALOG_READY->SetValue(false); |
| // Dropped all cached lib files (this behaves as if all functions and data |
| // sources are dropped). |
| LibCache::instance()->DropCache(); |
| } else { |
| { |
| unique_lock<mutex> unique_lock(catalog_version_lock_); |
| if (catalog_update_info_.catalog_version != resp.new_catalog_version) { |
| LOG(INFO) << "Catalog topic update applied with version: " << |
| resp.new_catalog_version << " new min catalog object version: " << |
| resp.catalog_object_version_lower_bound; |
| } |
| catalog_update_info_.catalog_version = resp.new_catalog_version; |
| catalog_update_info_.catalog_topic_version = delta.to_version; |
| catalog_update_info_.catalog_service_id = resp.catalog_service_id; |
| catalog_update_info_.catalog_object_version_lower_bound = |
| resp.catalog_object_version_lower_bound; |
| catalog_update_info_.UpdateCatalogVersionMetrics(); |
| } |
| ImpaladMetrics::CATALOG_READY->SetValue(resp.new_catalog_version > 0); |
| // TODO: deal with an error status |
| discard_result(UpdateCatalogMetrics()); |
| } |
| // Always update the minimum subscriber version for the catalog topic. |
| { |
| unique_lock<mutex> unique_lock(catalog_version_lock_); |
| DCHECK(delta.__isset.min_subscriber_topic_version); |
| min_subscriber_catalog_topic_version_ = delta.min_subscriber_topic_version; |
| } |
| catalog_version_update_cv_.NotifyAll(); |
| } |
| |
| void ImpalaServer::WaitForCatalogUpdate(const int64_t catalog_update_version, |
| const TUniqueId& catalog_service_id) { |
| unique_lock<mutex> unique_lock(catalog_version_lock_); |
| // Wait for the update to be processed locally. |
| VLOG_QUERY << "Waiting for catalog version: " << catalog_update_version |
| << " current version: " << catalog_update_info_.catalog_version; |
| while (catalog_update_info_.catalog_version < catalog_update_version && |
| catalog_update_info_.catalog_service_id == catalog_service_id) { |
| catalog_version_update_cv_.Wait(unique_lock); |
| } |
| |
| if (catalog_update_info_.catalog_service_id != catalog_service_id) { |
| VLOG_QUERY << "Detected change in catalog service ID"; |
| } else { |
| VLOG_QUERY << "Received catalog version: " << catalog_update_version; |
| } |
| } |
| |
| void ImpalaServer::WaitForCatalogUpdateTopicPropagation( |
| const TUniqueId& catalog_service_id) { |
| unique_lock<mutex> unique_lock(catalog_version_lock_); |
| int64_t min_req_subscriber_topic_version = |
| catalog_update_info_.catalog_topic_version; |
| VLOG_QUERY << "Waiting for min subscriber topic version: " |
| << min_req_subscriber_topic_version << " current version: " |
| << min_subscriber_catalog_topic_version_; |
| while (min_subscriber_catalog_topic_version_ < min_req_subscriber_topic_version && |
| catalog_update_info_.catalog_service_id == catalog_service_id) { |
| catalog_version_update_cv_.Wait(unique_lock); |
| } |
| |
| if (catalog_update_info_.catalog_service_id != catalog_service_id) { |
| VLOG_QUERY << "Detected change in catalog service ID"; |
| } else { |
| VLOG_QUERY << "Received min subscriber topic version: " |
| << min_req_subscriber_topic_version; |
| } |
| } |
| |
| void ImpalaServer::WaitForMinCatalogUpdate(const int64_t min_req_catalog_object_version, |
| const TUniqueId& catalog_service_id) { |
| unique_lock<mutex> unique_lock(catalog_version_lock_); |
| int64_t catalog_object_version_lower_bound = |
| catalog_update_info_.catalog_object_version_lower_bound; |
| // TODO: Set a timeout to eventually break out of this loop if something goes |
| // wrong? |
| VLOG_QUERY << "Waiting for local minimum catalog object version to be > " |
| << min_req_catalog_object_version << ", current lower bound of local versions: " |
| << catalog_object_version_lower_bound; |
| while (catalog_update_info_.catalog_service_id == catalog_service_id |
| && catalog_update_info_.catalog_object_version_lower_bound <= |
| min_req_catalog_object_version) { |
| catalog_version_update_cv_.Wait(unique_lock); |
| } |
| |
| if (catalog_update_info_.catalog_service_id != catalog_service_id) { |
| VLOG_QUERY << "Detected change in catalog service ID"; |
| } else { |
| VLOG_QUERY << "Updated catalog object version lower bound: " |
| << min_req_catalog_object_version; |
| } |
| } |
| |
| Status ImpalaServer::ProcessCatalogUpdateResult( |
| const TCatalogUpdateResult& catalog_update_result, bool wait_for_all_subscribers) { |
| const TUniqueId& catalog_service_id = catalog_update_result.catalog_service_id; |
| if (!catalog_update_result.__isset.updated_catalog_objects && |
| !catalog_update_result.__isset.removed_catalog_objects) { |
| // Operation with no result set. Use the version specified in |
| // 'catalog_update_result' to determine when the effects of this operation |
| // have been applied to the local catalog cache. |
| if (catalog_update_result.is_invalidate) { |
| WaitForMinCatalogUpdate(catalog_update_result.version, catalog_service_id); |
| } else { |
| WaitForCatalogUpdate(catalog_update_result.version, catalog_service_id); |
| } |
| if (wait_for_all_subscribers) { |
| // Now wait for this update to be propagated to all catalog topic subscribers. |
| // If we make it here it implies the first condition was met (the update was |
| // processed locally or the catalog service id has changed). |
| WaitForCatalogUpdateTopicPropagation(catalog_service_id); |
| } |
| } else { |
| CatalogUpdateResultIterator callback_ctx(catalog_update_result); |
| TUpdateCatalogCacheRequest update_req; |
| update_req.__set_is_delta(true); |
| update_req.__set_native_iterator_ptr(reinterpret_cast<int64_t>(&callback_ctx)); |
| // The catalog version is updated in WaitForCatalogUpdate below. So we need a |
| // standalone field in the request to update the service ID without touching the |
| // catalog version. |
| update_req.__set_catalog_service_id(catalog_update_result.catalog_service_id); |
| // Apply the changes to the local catalog cache. |
| TUpdateCatalogCacheResponse resp; |
| Status status = exec_env_->frontend()->UpdateCatalogCache(update_req, &resp); |
| if (!status.ok()) LOG(ERROR) << status.GetDetail(); |
| RETURN_IF_ERROR(status); |
| if (!wait_for_all_subscribers) return Status::OK(); |
| // Wait until we receive and process the catalog update that covers the effects |
| // (catalog objects) of this operation. |
| WaitForCatalogUpdate(catalog_update_result.version, catalog_service_id); |
| // Now wait for this update to be propagated to all catalog topic |
| // subscribers. |
| WaitForCatalogUpdateTopicPropagation(catalog_service_id); |
| } |
| return Status::OK(); |
| } |
| |
| void ImpalaServer::RegisterQueryLocations( |
| const PerBackendExecParams& per_backend_params, const TUniqueId& query_id) { |
| VLOG_QUERY << "Registering query locations"; |
| if (!per_backend_params.empty()) { |
| lock_guard<mutex> l(query_locations_lock_); |
| for (const auto& entry : per_backend_params) { |
| const TNetworkAddress& host = entry.first; |
| query_locations_[host].insert(query_id); |
| } |
| } |
| } |
| |
| void ImpalaServer::CancelQueriesOnFailedBackends( |
| const std::unordered_set<TNetworkAddress>& current_membership) { |
| // Maps from query id (to be cancelled) to a list of failed Impalads that are |
| // the cause of the cancellation. |
| map<TUniqueId, vector<TNetworkAddress>> queries_to_cancel; |
| { |
| // Build a list of queries that are running on failed hosts (as evidenced by their |
| // absence from the membership list). |
| // TODO: crash-restart failures can give false negatives for failed Impala demons. |
| lock_guard<mutex> l(query_locations_lock_); |
| QueryLocations::const_iterator loc_entry = query_locations_.begin(); |
| while (loc_entry != query_locations_.end()) { |
| if (current_membership.find(loc_entry->first) == current_membership.end()) { |
| // Add failed backend locations to all queries that ran on that backend. |
| for (const auto& query_id : loc_entry->second) { |
| queries_to_cancel[query_id].push_back(loc_entry->first); |
| } |
| loc_entry = query_locations_.erase(loc_entry); |
| } else { |
| ++loc_entry; |
| } |
| } |
| } |
| |
| if (cancellation_thread_pool_->GetQueueSize() + queries_to_cancel.size() > |
| MAX_CANCELLATION_QUEUE_SIZE) { |
| // Ignore the cancellations - we'll be able to process them on the next heartbeat |
| // instead. |
| LOG_EVERY_N(WARNING, 60) << "Cancellation queue is full"; |
| } else { |
| // Since we are the only producer for this pool, we know that this cannot block |
| // indefinitely since the queue is large enough to accept all new cancellation |
| // requests. |
| for (const auto& cancellation_entry : queries_to_cancel) { |
| stringstream backends_ss; |
| for (int i = 0; i < cancellation_entry.second.size(); ++i) { |
| backends_ss << TNetworkAddressToString(cancellation_entry.second[i]); |
| if (i + 1 != cancellation_entry.second.size()) backends_ss << ", "; |
| } |
| VLOG_QUERY << "Backends failed for query " << PrintId(cancellation_entry.first) |
| << ", adding to queue to check for cancellation: " << backends_ss.str(); |
| cancellation_thread_pool_->Offer(CancellationWork::BackendFailure( |
| cancellation_entry.first, cancellation_entry.second)); |
| } |
| } |
| } |
| |
| std::shared_ptr<const TBackendDescriptor> ImpalaServer::GetLocalBackendDescriptor() { |
| if (!services_started_.load()) return nullptr; |
| |
| lock_guard<mutex> l(local_backend_descriptor_lock_); |
| // Check if the current backend descriptor needs to be initialized. |
| if (local_backend_descriptor_.get() == nullptr) { |
| std::shared_ptr<TBackendDescriptor> new_be_desc = |
| std::make_shared<TBackendDescriptor>(); |
| BuildLocalBackendDescriptorInternal(new_be_desc.get()); |
| local_backend_descriptor_ = new_be_desc; |
| } |
| |
| // Check to see if it needs to be updated. |
| if (IsShuttingDown() != local_backend_descriptor_->is_quiescing) { |
| std::shared_ptr<TBackendDescriptor> new_be_desc = |
| std::make_shared<TBackendDescriptor>(*local_backend_descriptor_); |
| new_be_desc->is_quiescing = IsShuttingDown(); |
| local_backend_descriptor_ = new_be_desc; |
| } |
| |
| return local_backend_descriptor_; |
| } |
| |
| void ImpalaServer::BuildLocalBackendDescriptorInternal(TBackendDescriptor* be_desc) { |
| DCHECK(services_started_.load()); |
| bool is_quiescing = shutting_down_.Load() != 0; |
| |
| be_desc->__set_address(exec_env_->GetThriftBackendAddress()); |
| be_desc->__set_ip_address(exec_env_->ip_address()); |
| be_desc->__set_is_coordinator(FLAGS_is_coordinator); |
| be_desc->__set_is_executor(FLAGS_is_executor); |
| |
| Webserver* webserver = ExecEnv::GetInstance()->webserver(); |
| if (webserver != nullptr) { |
| be_desc->__set_debug_http_address( |
| MakeNetworkAddress(webserver->hostname(), webserver->port())); |
| be_desc->__set_secure_webserver(webserver->IsSecure()); |
| } |
| |
| const TNetworkAddress& krpc_address = exec_env_->krpc_address(); |
| DCHECK(IsResolvedAddress(krpc_address)); |
| be_desc->__set_krpc_address(krpc_address); |
| |
| be_desc->__set_admit_mem_limit(exec_env_->admit_mem_limit()); |
| be_desc->__set_admission_slots(exec_env_->admission_slots()); |
| be_desc->__set_is_quiescing(is_quiescing); |
| be_desc->executor_groups = GetExecutorGroups(FLAGS_executor_groups); |
| } |
| |
| ImpalaServer::QueryStateRecord::QueryStateRecord(const ClientRequestState& request_state, |
| bool copy_profile, const string& encoded_profile) { |
| id = request_state.query_id(); |
| const TExecRequest& request = request_state.exec_request(); |
| |
| const string* plan_str = request_state.summary_profile()->GetInfoString("Plan"); |
| if (plan_str != nullptr) plan = *plan_str; |
| stmt = request_state.sql_stmt(); |
| stmt_type = request.stmt_type; |
| effective_user = request_state.effective_user(); |
| default_db = request_state.default_db(); |
| start_time_us = request_state.start_time_us(); |
| end_time_us = request_state.end_time_us(); |
| has_coord = false; |
| |
| Coordinator* coord = request_state.GetCoordinator(); |
| if (coord != nullptr) { |
| num_complete_fragments = coord->progress().num_complete(); |
| total_fragments = coord->progress().total(); |
| has_coord = true; |
| } |
| query_state = request_state.BeeswaxQueryState(); |
| num_rows_fetched = request_state.num_rows_fetched(); |
| query_status = request_state.query_status(); |
| |
| request_state.query_events()->ToThrift(&event_sequence); |
| |
| if (copy_profile) { |
| stringstream ss; |
| request_state.profile()->PrettyPrint(&ss); |
| profile_str = ss.str(); |
| |
| Document json_profile(rapidjson::kObjectType); |
| request_state.profile()->ToJson(&json_profile); |
| |
| StringBuffer buffer; |
| Writer<StringBuffer> writer(buffer); |
| json_profile.Accept(writer); |
| json_profile_str = buffer.GetString(); |
| |
| if (encoded_profile.empty()) { |
| Status status = |
| request_state.profile()->SerializeToArchiveString(&encoded_profile_str); |
| if (!status.ok()) { |
| LOG_EVERY_N(WARNING, 1000) << "Could not serialize profile to archive string " |
| << status.GetDetail(); |
| } |
| } else { |
| encoded_profile_str = encoded_profile; |
| } |
| } |
| |
| // Save the query fragments so that the plan can be visualised. |
| for (const TPlanExecInfo& plan_exec_info: |
| request_state.exec_request().query_exec_request.plan_exec_info) { |
| fragments.insert(fragments.end(), |
| plan_exec_info.fragments.begin(), plan_exec_info.fragments.end()); |
| } |
| all_rows_returned = request_state.eos(); |
| last_active_time_ms = request_state.last_active_ms(); |
| // For statement types other than QUERY/DML, show an empty string for resource pool |
| // to indicate that they are not subjected to admission control. |
| if (stmt_type == TStmtType::QUERY || stmt_type == TStmtType::DML) { |
| resource_pool = request_state.request_pool(); |
| } |
| user_has_profile_access = request_state.user_has_profile_access(); |
| } |
| |
| bool ImpalaServer::QueryStateRecordLessThan::operator() ( |
| const QueryStateRecord& lhs, const QueryStateRecord& rhs) const { |
| if (lhs.start_time_us == rhs.start_time_us) return lhs.id < rhs.id; |
| return lhs.start_time_us < rhs.start_time_us; |
| } |
| |
| void ImpalaServer::ConnectionStart( |
| const ThriftServer::ConnectionContext& connection_context) { |
| if (connection_context.server_name == BEESWAX_SERVER_NAME) { |
| // Beeswax only allows for one session per connection, so we can share the session ID |
| // with the connection ID |
| const TUniqueId& session_id = connection_context.connection_id; |
| // Generate a secret per Beeswax session so that the HS2 secret validation mechanism |
| // prevent accessing of Beeswax sessions from HS2. |
| uuid secret_uuid; |
| { |
| lock_guard<mutex> l(uuid_lock_); |
| secret_uuid = crypto_uuid_generator_(); |
| } |
| TUniqueId secret; |
| UUIDToTUniqueId(secret_uuid, &secret); |
| shared_ptr<SessionState> session_state = |
| make_shared<SessionState>(this, session_id, secret); |
| session_state->closed = false; |
| session_state->start_time_ms = UnixMillis(); |
| session_state->last_accessed_ms = UnixMillis(); |
| session_state->database = "default"; |
| session_state->session_timeout = FLAGS_idle_session_timeout; |
| session_state->session_type = TSessionType::BEESWAX; |
| session_state->network_address = connection_context.network_address; |
| session_state->server_default_query_options = &default_query_options_; |
| session_state->kudu_latest_observed_ts = 0; |
| session_state->connections.insert(connection_context.connection_id); |
| |
| // If the username was set by a lower-level transport, use it. |
| if (!connection_context.username.empty()) { |
| session_state->connected_user = connection_context.username; |
| } |
| RegisterSessionTimeout(session_state->session_timeout); |
| |
| { |
| lock_guard<mutex> l(session_state_map_lock_); |
| bool success = |
| session_state_map_.insert(make_pair(session_id, session_state)).second; |
| // The session should not have already existed. |
| DCHECK(success); |
| } |
| { |
| lock_guard<mutex> l(connection_to_sessions_map_lock_); |
| connection_to_sessions_map_[connection_context.connection_id].insert(session_id); |
| } |
| ImpaladMetrics::IMPALA_SERVER_NUM_OPEN_BEESWAX_SESSIONS->Increment(1L); |
| } |
| } |
| |
| void ImpalaServer::ConnectionEnd( |
| const ThriftServer::ConnectionContext& connection_context) { |
| set<TUniqueId> disconnected_sessions; |
| { |
| unique_lock<mutex> l(connection_to_sessions_map_lock_); |
| ConnectionToSessionMap::iterator it = |
| connection_to_sessions_map_.find(connection_context.connection_id); |
| |
| // Not every connection must have an associated session |
| if (it == connection_to_sessions_map_.end()) return; |
| |
| // Sessions are not removed from the map even after they are closed and an entry |
| // won't be added to the map unless a session is established. |
| DCHECK(!it->second.empty()); |
| |
| // We don't expect a large number of sessions per connection, so we copy it, so that |
| // we can drop the map lock early. |
| disconnected_sessions = std::move(it->second); |
| connection_to_sessions_map_.erase(it); |
| } |
| |
| const string connection_id = PrintId(connection_context.connection_id); |
| LOG(INFO) << "Connection " << connection_id << " from client " |
| << TNetworkAddressToString(connection_context.network_address) |
| << " to server " << connection_context.server_name << " closed." |
| << " The connection had " << disconnected_sessions.size() |
| << " associated session(s)."; |
| |
| bool close = connection_context.server_name == BEESWAX_SERVER_NAME |
| || FLAGS_disconnected_session_timeout <= 0; |
| if (close) { |
| for (const TUniqueId& session_id : disconnected_sessions) { |
| Status status = CloseSessionInternal(session_id, SecretArg::SkipSecretCheck(), |
| /* ignore_if_absent= */ true); |
| if (!status.ok()) { |
| LOG(WARNING) << "Error closing session " << PrintId(session_id) << ": " |
| << status.GetDetail(); |
| } |
| } |
| } else { |
| DCHECK(connection_context.server_name == HS2_SERVER_NAME |
| || connection_context.server_name == HS2_HTTP_SERVER_NAME); |
| for (const TUniqueId& session_id : disconnected_sessions) { |
| shared_ptr<SessionState> state; |
| Status status = GetSessionState(session_id, SecretArg::SkipSecretCheck(), &state); |
| // The session may not exist if it was explicitly closed. |
| if (!status.ok()) continue; |
| lock_guard<mutex> state_lock(state->lock); |
| state->connections.erase(connection_context.connection_id); |
| if (state->connections.empty()) { |
| state->disconnected_ms = UnixMillis(); |
| RegisterSessionTimeout(FLAGS_disconnected_session_timeout); |
| } |
| } |
| } |
| } |
| |
| bool ImpalaServer::IsIdleConnection( |
| const ThriftServer::ConnectionContext& connection_context) { |
| // The set of sessions associated with this connection. |
| std::set<TUniqueId> session_ids; |
| { |
| TUniqueId connection_id = connection_context.connection_id; |
| unique_lock<mutex> l(connection_to_sessions_map_lock_); |
| ConnectionToSessionMap::iterator it = connection_to_sessions_map_.find(connection_id); |
| |
| // Not every connection must have an associated session |
| if (it == connection_to_sessions_map_.end()) return false; |
| |
| session_ids = it->second; |
| |
| // Sessions are not removed from the map even after they are closed and an entry |
| // won't be added to the map unless a session is established. The code below relies |
| // on this invariant to not mark a connection with no session yet as idle. |
| DCHECK(!session_ids.empty()); |
| } |
| |
| // Check if all the sessions associated with the connection are idle. |
| { |
| lock_guard<mutex> map_lock(session_state_map_lock_); |
| for (const TUniqueId& session_id : session_ids) { |
| const auto it = session_state_map_.find(session_id); |
| if (it == session_state_map_.end()) continue; |
| |
| // If any session associated with this connection is not idle, |
| // the connection is not idle. |
| lock_guard<mutex> state_lock(it->second->lock); |
| if (!it->second->expired) return false; |
| } |
| } |
| return true; |
| } |
| |
| void ImpalaServer::RegisterSessionTimeout(int32_t session_timeout) { |
| if (session_timeout <= 0) return; |
| { |
| lock_guard<mutex> l(session_timeout_lock_); |
| session_timeout_set_.insert(session_timeout); |
| } |
| session_timeout_cv_.NotifyOne(); |
| } |
| |
| void ImpalaServer::UnregisterSessionTimeout(int32_t session_timeout) { |
| if (session_timeout > 0) { |
| lock_guard<mutex> l(session_timeout_lock_); |
| auto itr = session_timeout_set_.find(session_timeout); |
| DCHECK(itr != session_timeout_set_.end()); |
| session_timeout_set_.erase(itr); |
| } |
| } |
| |
| [[noreturn]] void ImpalaServer::SessionMaintenance() { |
| while (true) { |
| { |
| unique_lock<mutex> timeout_lock(session_timeout_lock_); |
| if (session_timeout_set_.empty()) { |
| session_timeout_cv_.Wait(timeout_lock); |
| } else { |
| // Sleep for a second before doing maintenance. |
| session_timeout_cv_.WaitFor(timeout_lock, MICROS_PER_SEC); |
| } |
| } |
| |
| int64_t now = UnixMillis(); |
| int expired_cnt = 0; |
| VLOG(3) << "Session maintenance thread waking up"; |
| { |
| // TODO: If holding session_state_map_lock_ for the duration of this loop is too |
| // expensive, consider a priority queue. |
| lock_guard<mutex> map_lock(session_state_map_lock_); |
| vector<TUniqueId> sessions_to_remove; |
| for (SessionStateMap::value_type& map_entry : session_state_map_) { |
| const TUniqueId& session_id = map_entry.first; |
| std::shared_ptr<SessionState> session_state = map_entry.second; |
| unordered_set<TUniqueId> inflight_queries; |
| Status query_cancel_status; |
| { |
| lock_guard<mutex> state_lock(session_state->lock); |
| if (session_state->ref_count > 0) continue; |
| // A session closed by other means is in the process of being removed, and it's |
| // best not to interfere. |
| if (session_state->closed) continue; |
| |
| if (session_state->connections.size() == 0 |
| && (now - session_state->disconnected_ms) |
| >= FLAGS_disconnected_session_timeout * 1000L) { |
| // This session has no active connections and is past the disconnected session |
| // timeout, so close it. |
| DCHECK_ENUM_EQ(session_state->session_type, TSessionType::HIVESERVER2); |
| LOG(INFO) << "Closing session: " << PrintId(session_id) |
| << ", user: " << session_state->connected_user |
| << ", because it no longer has any open connections. The last " |
| << "connection was closed at: " |
| << ToStringFromUnixMillis(session_state->disconnected_ms); |
| session_state->closed = true; |
| sessions_to_remove.push_back(session_id); |
| ImpaladMetrics::IMPALA_SERVER_NUM_OPEN_HS2_SESSIONS->Increment(-1L); |
| UnregisterSessionTimeout(FLAGS_disconnected_session_timeout); |
| query_cancel_status = |
| Status::Expected(TErrorCode::DISCONNECTED_SESSION_CLOSED); |
| } else { |
| // Check if the session should be expired. |
| if (session_state->expired || session_state->session_timeout == 0) { |
| continue; |
| } |
| |
| int64_t last_accessed_ms = session_state->last_accessed_ms; |
| int64_t session_timeout_ms = session_state->session_timeout * 1000; |
| if (now - last_accessed_ms <= session_timeout_ms) continue; |
| LOG(INFO) << "Expiring session: " << PrintId(session_id) |
| << ", user: " << session_state->connected_user |
| << ", last active: " << ToStringFromUnixMillis(last_accessed_ms); |
| session_state->expired = true; |
| ++expired_cnt; |
| ImpaladMetrics::NUM_SESSIONS_EXPIRED->Increment(1L); |
| query_cancel_status = Status::Expected(TErrorCode::INACTIVE_SESSION_EXPIRED); |
| } |
| |
| // Since either expired or closed is true no more queries will be added to the |
| // inflight list. |
| inflight_queries.insert(session_state->inflight_queries.begin(), |
| session_state->inflight_queries.end()); |
| } |
| // Unregister all open queries from this session. |
| for (const TUniqueId& query_id : inflight_queries) { |
| cancellation_thread_pool_->Offer( |
| CancellationWork::TerminatedByServer(query_id, query_cancel_status, true)); |
| } |
| } |
| // Remove any sessions that were closed from the map. |
| for (const TUniqueId& session_id : sessions_to_remove) { |
| session_state_map_.erase(session_id); |
| } |
| } |
| LOG_IF(INFO, expired_cnt > 0) << "Expired sessions. Count: " << expired_cnt; |
| } |
| } |
| |
| [[noreturn]] void ImpalaServer::ExpireQueries() { |
| while (true) { |
| // The following block accomplishes four things: |
| // |
| // 1. Update the ordered list of queries by checking the 'idle_time' parameter in |
| // client_request_state. We are able to avoid doing this for *every* query in flight |
| // thanks to the observation that expiry times never move backwards, only |
| // forwards. Therefore once we find a query that a) hasn't changed its idle time and |
| // b) has not yet expired we can stop moving through the list. If the idle time has |
| // changed, we need to re-insert the query in the right place in queries_by_timestamp_ |
| // |
| // 2. Remove any queries that would have expired but have already been closed for any |
| // reason. |
| // |
| // 3. Compute the next time a query *might* expire, so that the sleep at the end of |
| // this loop has an accurate duration to wait. If the list of queries is empty, the |
| // default sleep duration is half the idle query timeout. |
| // |
| // 4. Cancel queries with CPU and scan bytes constraints if limit is exceeded |
| int64_t now; |
| { |
| lock_guard<mutex> l(query_expiration_lock_); |
| ExpirationQueue::iterator expiration_event = queries_by_timestamp_.begin(); |
| now = UnixMillis(); |
| while (expiration_event != queries_by_timestamp_.end()) { |
| // 'queries_by_timestamp_' is stored in ascending order of deadline so we can |
| // break out of the loop and sleep as soon as we see a deadline in the future. |
| if (expiration_event->deadline > now) break; |
| shared_ptr<ClientRequestState> crs = |
| GetClientRequestState(expiration_event->query_id); |
| if (crs == nullptr || crs->is_expired()) { |
| // Query was deleted or expired already from a previous expiration event. |
| expiration_event = queries_by_timestamp_.erase(expiration_event); |
| continue; |
| } |
| |
| // Check for CPU and scanned bytes limits |
| if (expiration_event->kind == ExpirationKind::RESOURCE_LIMIT) { |
| Status resource_status = CheckResourceLimits(crs.get()); |
| if (resource_status.ok()) { |
| queries_by_timestamp_.emplace( |
| ExpirationEvent{now + EXPIRATION_CHECK_INTERVAL_MS, |
| expiration_event->query_id, ExpirationKind::RESOURCE_LIMIT}); |
| } else { |
| ExpireQuery(crs.get(), resource_status); |
| } |
| expiration_event = queries_by_timestamp_.erase(expiration_event); |
| continue; |
| } |
| |
| // If the query time limit expired, we must cancel the query. |
| if (expiration_event->kind == ExpirationKind::EXEC_TIME_LIMIT) { |
| int32_t exec_time_limit_s = crs->query_options().exec_time_limit_s; |
| VLOG_QUERY << "Expiring query " << PrintId(expiration_event->query_id) |
| << " due to execution time limit of " << exec_time_limit_s << "s."; |
| ExpireQuery(crs.get(), |
| Status::Expected(TErrorCode::EXEC_TIME_LIMIT_EXCEEDED, |
| PrintId(expiration_event->query_id), |
| PrettyPrinter::Print(exec_time_limit_s, TUnit::TIME_S))); |
| expiration_event = queries_by_timestamp_.erase(expiration_event); |
| continue; |
| } |
| DCHECK(expiration_event->kind == ExpirationKind::IDLE_TIMEOUT) |
| << static_cast<int>(expiration_event->kind); |
| |
| // Now check to see if the idle timeout has expired. We must check the actual |
| // expiration time in case the query has updated 'last_active_ms' since the last |
| // time we looked. |
| int32_t idle_timeout_s = crs->query_options().query_timeout_s; |
| if (FLAGS_idle_query_timeout > 0 && idle_timeout_s > 0) { |
| idle_timeout_s = min(FLAGS_idle_query_timeout, idle_timeout_s); |
| } else { |
| // Use a non-zero timeout, if one exists |
| idle_timeout_s = max(FLAGS_idle_query_timeout, idle_timeout_s); |
| } |
| int64_t expiration = crs->last_active_ms() + (idle_timeout_s * 1000L); |
| if (now < expiration) { |
| // If the real expiration date is in the future we may need to re-insert the |
| // query's expiration event at its correct location. |
| if (expiration == expiration_event->deadline) { |
| // The query hasn't been updated since it was inserted, so we know (by the |
| // fact that queries are inserted in-expiration-order initially) that it is |
| // still the next query to expire. No need to re-insert it. |
| break; |
| } else { |
| // Erase and re-insert with an updated expiration time. |
| TUniqueId query_id = expiration_event->query_id; |
| expiration_event = queries_by_timestamp_.erase(expiration_event); |
| queries_by_timestamp_.emplace(ExpirationEvent{ |
| expiration, query_id, ExpirationKind::IDLE_TIMEOUT}); |
| } |
| } else if (!crs->is_active()) { |
| // Otherwise time to expire this query |
| VLOG_QUERY << "Expiring query due to client inactivity: " |
| << PrintId(expiration_event->query_id) << ", last activity was at: " |
| << ToStringFromUnixMillis(crs->last_active_ms()); |
| ExpireQuery(crs.get(), |
| Status::Expected(TErrorCode::INACTIVE_QUERY_EXPIRED, |
| PrintId(expiration_event->query_id), |
| PrettyPrinter::Print(idle_timeout_s, TUnit::TIME_S))); |
| expiration_event = queries_by_timestamp_.erase(expiration_event); |
| } else { |
| // Iterator is moved on in every other branch. |
| ++expiration_event; |
| } |
| } |
| } |
| // Since we only allow timeouts to be 1s or greater, the earliest that any new query |
| // could expire is in 1s time. An existing query may expire sooner, but we are |
| // comfortable with a maximum error of 1s as a trade-off for not frequently waking |
| // this thread. |
| SleepForMs(EXPIRATION_CHECK_INTERVAL_MS); |
| } |
| } |
| |
| [[noreturn]] void ImpalaServer::UnresponsiveBackendThread() { |
| int64_t max_lag_ms = FLAGS_status_report_max_retry_s * 1000 |
| * (1 + FLAGS_status_report_cancellation_padding / 100.0); |
| DCHECK_GT(max_lag_ms, 0); |
| VLOG(1) << "Queries will be cancelled if a backend has not reported its status in " |
| << "more than " << max_lag_ms << "ms."; |
| while (true) { |
| vector<CancellationWork> to_cancel; |
| client_request_state_map_.DoFuncForAllEntries( |
| [&](const std::shared_ptr<ClientRequestState>& request_state) { |
| Coordinator* coord = request_state->GetCoordinator(); |
| if (coord != nullptr) { |
| TNetworkAddress address; |
| int64_t lag_time_ms = coord->GetMaxBackendStateLagMs(&address); |
| if (lag_time_ms > max_lag_ms) { |
| to_cancel.push_back( |
| CancellationWork::TerminatedByServer(request_state->query_id(), |
| Status(TErrorCode::UNRESPONSIVE_BACKEND, |
| PrintId(request_state->query_id()), |
| TNetworkAddressToString(address), lag_time_ms, max_lag_ms), |
| false /* unregister */)); |
| } |
| } |
| }); |
| |
| // We call Offer() outside of DoFuncForAllEntries() to ensure that if the |
| // cancellation_thread_pool_ queue is full, we're not blocked while holding one of the |
| // 'client_request_state_map_' shard locks. |
| for (auto cancellation_work : to_cancel) { |
| cancellation_thread_pool_->Offer(cancellation_work); |
| } |
| SleepForMs(max_lag_ms * 0.1); |
| } |
| } |
| |
| Status ImpalaServer::CheckResourceLimits(ClientRequestState* crs) { |
| Coordinator* coord = crs->GetCoordinator(); |
| // Coordinator may be null if query has not started executing, check again later. |
| if (coord == nullptr) return Status::OK(); |
| Coordinator::ResourceUtilization utilization = coord->ComputeQueryResourceUtilization(); |
| |
| // CPU time consumed by the query so far |
| int64_t cpu_time_ns = utilization.cpu_sys_ns + utilization.cpu_user_ns; |
| int64_t cpu_limit_s = crs->query_options().cpu_limit_s; |
| int64_t cpu_limit_ns = cpu_limit_s * 1000'000'000L; |
| if (cpu_limit_ns > 0 && cpu_time_ns > cpu_limit_ns) { |
| Status err = Status::Expected(TErrorCode::CPU_LIMIT_EXCEEDED, |
| PrintId(crs->query_id()), PrettyPrinter::Print(cpu_limit_s, TUnit::TIME_S)); |
| VLOG_QUERY << err.msg().msg(); |
| return err; |
| } |
| |
| int64_t scan_bytes = utilization.bytes_read; |
| int64_t scan_bytes_limit = crs->query_options().scan_bytes_limit; |
| if (scan_bytes_limit > 0 && scan_bytes > scan_bytes_limit) { |
| Status err = Status::Expected(TErrorCode::SCAN_BYTES_LIMIT_EXCEEDED, |
| PrintId(crs->query_id()), PrettyPrinter::Print(scan_bytes_limit, TUnit::BYTES)); |
| VLOG_QUERY << err.msg().msg(); |
| return err; |
| } |
| // Query is within the resource limits, check again later. |
| return Status::OK(); |
| } |
| |
| void ImpalaServer::ExpireQuery(ClientRequestState* crs, const Status& status) { |
| DCHECK(!status.ok()); |
| cancellation_thread_pool_->Offer( |
| CancellationWork::TerminatedByServer(crs->query_id(), status, false)); |
| ImpaladMetrics::NUM_QUERIES_EXPIRED->Increment(1L); |
| crs->set_expired(); |
| } |
| |
| Status ImpalaServer::Start(int32_t thrift_be_port, int32_t beeswax_port, int32_t hs2_port, |
| int32_t hs2_http_port) { |
| exec_env_->SetImpalaServer(this); |
| |
| // We must register the HTTP handlers after registering the ImpalaServer with the |
| // ExecEnv. Otherwise the HTTP handlers will try to resolve the ImpalaServer through the |
| // ExecEnv singleton and will receive a nullptr. |
| http_handler_.reset(new ImpalaHttpHandler(this)); |
| http_handler_->RegisterHandlers(exec_env_->webserver()); |
| |
| if (!FLAGS_is_coordinator && !FLAGS_is_executor) { |
| return Status("Impala does not have a valid role configured. " |
| "Either --is_coordinator or --is_executor must be set to true."); |
| } |
| |
| // Subscribe with the statestore. Coordinators need to subscribe to the catalog topic |
| // then wait for the initial catalog update. |
| RETURN_IF_ERROR(exec_env_->StartStatestoreSubscriberService()); |
| |
| if (FLAGS_is_coordinator) exec_env_->frontend()->WaitForCatalog(); |
| |
| SSLProtocol ssl_version = SSLProtocol::TLSv1_0; |
| if (IsExternalTlsConfigured() || IsInternalTlsConfigured()) { |
| RETURN_IF_ERROR( |
| SSLProtoVersions::StringToProtocol(FLAGS_ssl_minimum_version, &ssl_version)); |
| } |
| |
| // Start the internal service. |
| if (thrift_be_port > 0 || (TestInfo::is_test() && thrift_be_port == 0)) { |
| boost::shared_ptr<ImpalaInternalService> thrift_if(new ImpalaInternalService()); |
| boost::shared_ptr<TProcessor> be_processor( |
| new ImpalaInternalServiceProcessor(thrift_if)); |
| boost::shared_ptr<TProcessorEventHandler> event_handler( |
| new RpcEventHandler("backend", exec_env_->metrics())); |
| be_processor->setEventHandler(event_handler); |
| |
| ThriftServerBuilder be_builder("backend", be_processor, thrift_be_port); |
| |
| if (IsInternalTlsConfigured()) { |
| LOG(INFO) << "Enabling SSL for backend"; |
| be_builder.ssl(FLAGS_ssl_server_certificate, FLAGS_ssl_private_key) |
| .pem_password_cmd(FLAGS_ssl_private_key_password_cmd) |
| .ssl_version(ssl_version) |
| .cipher_list(FLAGS_ssl_cipher_list); |
| } |
| ThriftServer* server; |
| RETURN_IF_ERROR(be_builder.metrics(exec_env_->metrics()).Build(&server)); |
| thrift_be_server_.reset(server); |
| } |
| |
| if (!FLAGS_is_coordinator) { |
| LOG(INFO) << "Initialized executor Impala server on " |
| << TNetworkAddressToString(GetThriftBackendAddress()); |
| } else { |
| // Initialize the client servers. |
| boost::shared_ptr<ImpalaServer> handler = shared_from_this(); |
| if (beeswax_port > 0 || (TestInfo::is_test() && beeswax_port == 0)) { |
| boost::shared_ptr<TProcessor> beeswax_processor( |
| new ImpalaServiceProcessor(handler)); |
| boost::shared_ptr<TProcessorEventHandler> event_handler( |
| new RpcEventHandler("beeswax", exec_env_->metrics())); |
| beeswax_processor->setEventHandler(event_handler); |
| ThriftServerBuilder builder(BEESWAX_SERVER_NAME, beeswax_processor, beeswax_port); |
| |
| if (IsExternalTlsConfigured()) { |
| LOG(INFO) << "Enabling SSL for Beeswax"; |
| builder.ssl(FLAGS_ssl_server_certificate, FLAGS_ssl_private_key) |
| .pem_password_cmd(FLAGS_ssl_private_key_password_cmd) |
| .ssl_version(ssl_version) |
| .cipher_list(FLAGS_ssl_cipher_list); |
| } |
| |
| ThriftServer* server; |
| RETURN_IF_ERROR( |
| builder.auth_provider(AuthManager::GetInstance()->GetExternalAuthProvider()) |
| .metrics(exec_env_->metrics()) |
| .max_concurrent_connections(FLAGS_fe_service_threads) |
| .queue_timeout_ms(FLAGS_accepted_client_cnxn_timeout) |
| .idle_poll_period_ms(FLAGS_idle_client_poll_period_s * MILLIS_PER_SEC) |
| .Build(&server)); |
| beeswax_server_.reset(server); |
| beeswax_server_->SetConnectionHandler(this); |
| } |
| |
| if (hs2_port > 0 || (TestInfo::is_test() && hs2_port == 0)) { |
| boost::shared_ptr<TProcessor> hs2_fe_processor( |
| new ImpalaHiveServer2ServiceProcessor(handler)); |
| boost::shared_ptr<TProcessorEventHandler> event_handler( |
| new RpcEventHandler("hs2", exec_env_->metrics())); |
| hs2_fe_processor->setEventHandler(event_handler); |
| |
| ThriftServerBuilder builder(HS2_SERVER_NAME, hs2_fe_processor, hs2_port); |
| |
| if (IsExternalTlsConfigured()) { |
| LOG(INFO) << "Enabling SSL for HiveServer2"; |
| builder.ssl(FLAGS_ssl_server_certificate, FLAGS_ssl_private_key) |
| .pem_password_cmd(FLAGS_ssl_private_key_password_cmd) |
| .ssl_version(ssl_version) |
| .cipher_list(FLAGS_ssl_cipher_list); |
| } |
| |
| ThriftServer* server; |
| RETURN_IF_ERROR( |
| builder.auth_provider(AuthManager::GetInstance()->GetExternalAuthProvider()) |
| .metrics(exec_env_->metrics()) |
| .max_concurrent_connections(FLAGS_fe_service_threads) |
| .queue_timeout_ms(FLAGS_accepted_client_cnxn_timeout) |
| .idle_poll_period_ms(FLAGS_idle_client_poll_period_s * MILLIS_PER_SEC) |
| .Build(&server)); |
| hs2_server_.reset(server); |
| hs2_server_->SetConnectionHandler(this); |
| } |
| |
| if (hs2_http_port > 0 || (TestInfo::is_test() && hs2_http_port == 0)) { |
| boost::shared_ptr<TProcessor> hs2_http_processor( |
| new ImpalaHiveServer2ServiceProcessor(handler)); |
| boost::shared_ptr<TProcessorEventHandler> event_handler( |
| new RpcEventHandler("hs2_http", exec_env_->metrics())); |
| hs2_http_processor->setEventHandler(event_handler); |
| |
| ThriftServer* http_server; |
| ThriftServerBuilder http_builder( |
| HS2_HTTP_SERVER_NAME, hs2_http_processor, hs2_http_port); |
| if (IsExternalTlsConfigured()) { |
| LOG(INFO) << "Enabling SSL for HiveServer2 HTTP endpoint."; |
| http_builder.ssl(FLAGS_ssl_server_certificate, FLAGS_ssl_private_key) |
| .pem_password_cmd(FLAGS_ssl_private_key_password_cmd) |
| .ssl_version(ssl_version) |
| .cipher_list(FLAGS_ssl_cipher_list); |
| } |
| |
| RETURN_IF_ERROR( |
| http_builder |
| .auth_provider(AuthManager::GetInstance()->GetExternalAuthProvider()) |
| .transport_type(ThriftServer::TransportType::HTTP) |
| .metrics(exec_env_->metrics()) |
| .max_concurrent_connections(FLAGS_fe_service_threads) |
| .queue_timeout_ms(FLAGS_accepted_client_cnxn_timeout) |
| .idle_poll_period_ms(FLAGS_idle_client_poll_period_s * MILLIS_PER_SEC) |
| .Build(&http_server)); |
| hs2_http_server_.reset(http_server); |
| hs2_http_server_->SetConnectionHandler(this); |
| } |
| } |
| LOG(INFO) << "Initialized coordinator/executor Impala server on " |
| << TNetworkAddressToString(GetThriftBackendAddress()); |
| |
| // Start the RPC services. |
| RETURN_IF_ERROR(exec_env_->StartKrpcService()); |
| if (thrift_be_server_.get()) { |
| RETURN_IF_ERROR(thrift_be_server_->Start()); |
| LOG(INFO) << "Impala InternalService listening on " << thrift_be_server_->port(); |
| } |
| if (hs2_server_.get()) { |
| RETURN_IF_ERROR(hs2_server_->Start()); |
| LOG(INFO) << "Impala HiveServer2 Service listening on " << hs2_server_->port(); |
| } |
| if (hs2_http_server_.get()) { |
| RETURN_IF_ERROR(hs2_http_server_->Start()); |
| LOG(INFO) << "Impala HiveServer2 Service (HTTP) listening on " |
| << hs2_http_server_->port(); |
| } |
| if (beeswax_server_.get()) { |
| RETURN_IF_ERROR(beeswax_server_->Start()); |
| LOG(INFO) << "Impala Beeswax Service listening on " << beeswax_server_->port(); |
| } |
| RETURN_IF_ERROR(DebugAction(FLAGS_debug_actions, "IMPALA_SERVER_END_OF_START")); |
| services_started_ = true; |
| ImpaladMetrics::IMPALA_SERVER_READY->SetValue(true); |
| LOG(INFO) << "Impala has started."; |
| |
| return Status::OK(); |
| } |
| |
| void ImpalaServer::Join() { |
| // The server shuts down by exiting the process, so just block here until the process |
| // exits. |
| thrift_be_server_->Join(); |
| thrift_be_server_.reset(); |
| |
| if (FLAGS_is_coordinator) { |
| beeswax_server_->Join(); |
| hs2_server_->Join(); |
| beeswax_server_.reset(); |
| hs2_server_.reset(); |
| } |
| } |
| |
| shared_ptr<ClientRequestState> ImpalaServer::GetClientRequestState( |
| const TUniqueId& query_id) { |
| DCHECK_EQ(this, ExecEnv::GetInstance()->impala_server()); |
| ScopedShardedMapRef<std::shared_ptr<ClientRequestState>> map_ref(query_id, |
| &client_request_state_map_); |
| DCHECK(map_ref.get() != nullptr); |
| |
| auto entry = map_ref->find(query_id); |
| if (entry == map_ref->end()) { |
| return shared_ptr<ClientRequestState>(); |
| } else { |
| return entry->second; |
| } |
| } |
| |
| Status ImpalaServer::CheckClientRequestSession( |
| SessionState* session, const std::string& client_request_effective_user, |
| const TUniqueId& query_id) { |
| const string& session_user = GetEffectiveUser(*session); |
| // Empty session users only occur for unauthenticated sessions where no user was |
| // specified by the client, e.g. unauthenticated beeswax sessions. Skip the |
| // check in this case because no security is enabled. Some tests rely on |
| // this behaviour, e.g. to poll query status from a new beeswax connection. |
| if (!session_user.empty() && session_user != client_request_effective_user) { |
| Status err = Status::Expected( |
| Substitute(LEGACY_INVALID_QUERY_HANDLE_TEMPLATE, PrintId(query_id))); |
| VLOG(1) << err << " caused by user mismatch: '" << session_user << "' vs '" |
| << client_request_effective_user << "'"; |
| return err; |
| } |
| return Status::OK(); |
| } |
| |
| void ImpalaServer::UpdateFilter(TUpdateFilterResult& result, |
| const TUpdateFilterParams& params) { |
| DCHECK(params.__isset.query_id); |
| DCHECK(params.__isset.filter_id); |
| shared_ptr<ClientRequestState> client_request_state = |
| GetClientRequestState(params.query_id); |
| if (client_request_state.get() == nullptr) { |
| LOG(INFO) << "Could not find client request state: " << PrintId(params.query_id); |
| return; |
| } |
| client_request_state->UpdateFilter(params); |
| } |
| |
| Status ImpalaServer::CheckNotShuttingDown() const { |
| if (!IsShuttingDown()) return Status::OK(); |
| return Status::Expected(ErrorMsg( |
| TErrorCode::SERVER_SHUTTING_DOWN, ShutdownStatusToString(GetShutdownStatus()))); |
| } |
| |
| ShutdownStatusPB ImpalaServer::GetShutdownStatus() const { |
| ShutdownStatusPB result; |
| int64_t shutdown_time = shutting_down_.Load(); |
| DCHECK_GT(shutdown_time, 0); |
| int64_t shutdown_deadline = shutdown_deadline_.Load(); |
| DCHECK_GT(shutdown_time, 0); |
| int64_t now = MonotonicMillis(); |
| int64_t elapsed_ms = now - shutdown_time; |
| result.set_grace_remaining_ms( |
| max<int64_t>(0, FLAGS_shutdown_grace_period_s * 1000 - elapsed_ms)); |
| result.set_deadline_remaining_ms(max<int64_t>(0, shutdown_deadline - now)); |
| result.set_finstances_executing( |
| ImpaladMetrics::IMPALA_SERVER_NUM_FRAGMENTS_IN_FLIGHT->GetValue()); |
| result.set_client_requests_registered( |
| ImpaladMetrics::NUM_QUERIES_REGISTERED->GetValue()); |
| result.set_backend_queries_executing( |
| ImpaladMetrics::BACKEND_NUM_QUERIES_EXECUTING->GetValue()); |
| return result; |
| } |
| |
| string ImpalaServer::ShutdownStatusToString(const ShutdownStatusPB& shutdown_status) { |
| return Substitute("shutdown grace period left: $0, deadline left: $1, " |
| "queries registered on coordinator: $2, queries executing: $3, " |
| "fragment instances: $4", |
| PrettyPrinter::Print(shutdown_status.grace_remaining_ms(), TUnit::TIME_MS), |
| PrettyPrinter::Print(shutdown_status.deadline_remaining_ms(), TUnit::TIME_MS), |
| shutdown_status.client_requests_registered(), |
| shutdown_status.backend_queries_executing(), |
| shutdown_status.finstances_executing()); |
| } |
| |
| Status ImpalaServer::StartShutdown( |
| int64_t relative_deadline_s, ShutdownStatusPB* shutdown_status) { |
| DCHECK_GE(relative_deadline_s, -1); |
| if (relative_deadline_s == -1) relative_deadline_s = FLAGS_shutdown_deadline_s; |
| int64_t now = MonotonicMillis(); |
| int64_t new_deadline = now + relative_deadline_s * 1000L; |
| |
| bool set_deadline = false; |
| bool set_grace = false; |
| int64_t curr_deadline = shutdown_deadline_.Load(); |
| while (curr_deadline == 0 || curr_deadline > new_deadline) { |
| // Set the deadline - it was either unset or later than the new one. |
| if (shutdown_deadline_.CompareAndSwap(curr_deadline, new_deadline)) { |
| set_deadline = true; |
| break; |
| } |
| curr_deadline = shutdown_deadline_.Load(); |
| } |
| |
| while (shutting_down_.Load() == 0) { |
| if (!shutting_down_.CompareAndSwap(0, now)) continue; |
| unique_ptr<Thread> t; |
| Status status = |
| Thread::Create("shutdown", "shutdown", [this] { ShutdownThread(); }, &t, false); |
| if (!status.ok()) { |
| LOG(ERROR) << "Failed to create shutdown thread: " << status.GetDetail(); |
| return status; |
| } |
| set_grace = true; |
| break; |
| } |
| *shutdown_status = GetShutdownStatus(); |
| // Show the full grace/limit times to avoid showing confusing intermediate values |
| // to the person running the statement. |
| if (set_grace) { |
| shutdown_status->set_grace_remaining_ms(FLAGS_shutdown_grace_period_s * 1000L); |
| } |
| if (set_deadline) { |
| shutdown_status->set_deadline_remaining_ms(relative_deadline_s * 1000L); |
| } |
| return Status::OK(); |
| } |
| |
| [[noreturn]] void ImpalaServer::ShutdownThread() { |
| while (true) { |
| SleepForMs(1000); |
| const ShutdownStatusPB& shutdown_status = GetShutdownStatus(); |
| LOG(INFO) << "Shutdown status: " << ShutdownStatusToString(shutdown_status); |
| if (shutdown_status.grace_remaining_ms() <= 0 |
| && shutdown_status.backend_queries_executing() == 0 |
| && shutdown_status.client_requests_registered() == 0) { |
| break; |
| } else if (shutdown_status.deadline_remaining_ms() <= 0) { |
| break; |
| } |
| } |
| LOG(INFO) << "Shutdown complete, going down."; |
| exit(0); |
| } |
| |
| // This should never be inlined to prevent it potentially being optimized, e.g. |
| // by short-circuiting the comparisons. |
| __attribute__((noinline)) int ImpalaServer::SecretArg::ConstantTimeCompare( |
| const TUniqueId& other) const { |
| // Compiles to two integer comparisons and an addition with no branches. |
| // TODO: consider replacing with CRYPTO_memcmp() once our minimum supported OpenSSL |
| // version has it. |
| return (secret_.hi != other.hi) + (secret_.lo != other.lo); |
| } |
| } |