| // 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. |
| #pragma once |
| |
| #include <map> |
| #include <string> |
| |
| #include "kudu/gutil/macros.h" |
| #include "kudu/util/status.h" |
| |
| namespace kudu { |
| |
| class ExternalMiniCluster; |
| class FsManager; |
| |
| // Verifies correctness of the logs in an external mini-cluster. |
| class LogVerifier { |
| public: |
| explicit LogVerifier(ExternalMiniCluster* cluster); |
| ~LogVerifier(); |
| |
| // Verify that, for every tablet in the cluster, the logs of each of that tablet's replicas |
| // have matching committed operations. In other words, if any replica has a log entry |
| // 'COMMIT term.index', then verifies that no other replica has a COMMIT entry for the |
| // same index with a different term. |
| // |
| // This is the most basic correctness condition of Raft: all replicas should commit the |
| // same operations. |
| // |
| // NOTE: if the cluster is not shut down, it is possible for this method to fail spuriously |
| // trying to read a WAL that is currently being written. In this case, it's advisable to |
| // loop and retry on failure. |
| Status VerifyCommittedOpIdsMatch(); |
| |
| private: |
| // Scan the WALs for tablet 'tablet_id' on the given 'fs'. Sets entries |
| // in '*index_to_term' for each COMMIT entry found in the WALs. |
| Status ScanForCommittedOpIds(FsManager* fs, const std::string& tablet_id, |
| std::map<int64_t, int64_t>* index_to_term); |
| |
| ExternalMiniCluster* const cluster_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LogVerifier); |
| }; |
| |
| } // namespace kudu |