unstable ut SchemaSyncTest.PhysicalDropTableMeetsUnRemovedRegions

[Lloyd-Pottiger]

Bug Report

https://ci.pingcap.net/blue/organizations/jenkins/tiflash-ghpr-unit-tests/detail/tiflash-ghpr-unit-tests/13089/pipeline/

[JaySon-Huang]

Cuase by a background task that run gc with thread_id=197

[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.481 +08:00] [INFO] [SchemaSyncService.cpp:221] ["Schema GC begin, last_safepoint=none safepoint=18446744073709551615"] [source="keyspace=4294967295"] [thread_id=1]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.481 +08:00] [INFO] [SchemaSyncService.cpp:70] ["add sync schema task"] [source="keyspace=4294967295"] [thread_id=196]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.481 +08:00] [INFO] [SchemaSyncService.cpp:121] ["add sync schema task for keyspaces done, num_add_tasks=1"] [thread_id=196]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.481 +08:00] [INFO] [SchemaSyncService.cpp:259] ["Detect stale table, database_name=db_1 table_name=t_30 database_tombstone=0 table_tombstone=1713500731450985 safepoint=18446744073709551615"] [source="keyspace=4294967295"] [thread_id=1]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.481 +08:00] [DEBUG] [SchemaSyncService.cpp:153] ["remove sync schema task for keyspaces done, num_remove_tasks=0"] [thread_id=196]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.482 +08:00] [TRACE] [PDTiKVClient.h:149] ["use safe point v1, gc_safe_point=10000000"] [thread_id=197]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.482 +08:00] [WARN] [SchemaSyncService.cpp:306] ["Physically drop table is skip, regions are not totally removed from TiFlash, remain_region_ids=[1001, 1002, 1003] table_tombstone=1713500731450985 safepoint=18446744073709551615 db_1.t_30 database_id=1 table_id=30"] [source="keyspace=4294967295"] [thread_id=1]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.482 +08:00] [INFO] [SchemaSyncService.cpp:221] ["Schema GC begin, last_safepoint=none safepoint=10000000"] [source="keyspace=4294967295"] [thread_id=197]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.482 +08:00] [INFO] [SchemaSyncService.cpp:435] ["Schema GC meet error, will try again later, last_safepoint=none safepoint=18446744073709551615"] [source="keyspace=4294967295"] [thread_id=1]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.482 +08:00] [INFO] [SchemaSyncService.cpp:421] ["Schema GC done, tables_removed=0 databases_removed=0 safepoint=10000000"] [source="keyspace=4294967295"] [thread_id=197]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.482 +08:00] [TRACE] [PDTiKVClient.h:149] ["use safe point v1, gc_safe_point=10000000"] [thread_id=197]
[2024-04-19T04:25:32.673Z] /home/jenkins/agent/workspace/tiflash-build-common/tiflash/dbms/src/TiDB/Schema/tests/gtest_schema_sync.cpp:372: Failure
[2024-04-19T04:25:32.673Z] Value of: last_gc_safe_point.has_value()
[2024-04-19T04:25:32.673Z]   Actual: true
[2024-04-19T04:25:32.673Z] Expected: false
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.483 +08:00] [INFO] [SchemaSyncService.cpp:170] ["SchemaSyncService stopped"] [thread_id=1]
[2024-04-19T04:25:32.673Z] [2024/04/19 12:25:31.483 +08:00] [ERROR] [Exception.cpp:96] ["std::exception. Code: 1001, type: testing::AssertionException, e.what() = /home/jenkins/agent/workspace/tiflash-build-common/tiflash/dbms/src/TiDB/Schema/tests/gtest_schema_sync.cpp:372: Failure\nValue of: last_gc_safe_point.has_value()\n  Actual: true\nExpected: false"] [source="virtual void DB::tests::SchemaSyncTest_PhysicalDropTableMeetsUnRemovedRegions_Test::TestBody()"] [thread_id=1]
[2024-04-19T04:25:32.673Z] /home/jenkins/agent/workspace/tiflash-build-common/tiflash/dbms/src/TiDB/Schema/tests/gtest_schema_sync.cpp:387: Failure
[2024-04-19T04:25:32.673Z] Failed