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Deflake ExternalSSTFileTest.PickedLevelBug (#8307)

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Summary:
The test want to make sure these's no compaction during `AddFile`
(between `DBImpl::AddFile:MutexLock` and `DBImpl::AddFile:MutexUnlock`)
but the mutex could be unlocked by `EnterUnbatched()`.
Move the lock start point after bumping the ingest file number.

Also fix the dead lock when ASSERT fails.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8307

Reviewed By: ajkr

Differential Revision: D28479849

Pulled By: jay-zhuang

fbshipit-source-id: b3c50f66aa5d5f59c5c27f815bfea189c4cd06cb
This commit is contained in:
Jay Zhuang 2021-05-20 09:28:58 -07:00 committed by Facebook GitHub Bot
parent f76326e370
commit 94b4faa0f1
1 changed files with 9 additions and 2 deletions
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11
db/external_sst_file_test.cc
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@ -1291,8 +1291,11 @@ TEST_F(ExternalSSTFileTest, PickedLevelBug) {
// We have 2 overlapping files in L0
EXPECT_EQ(FilesPerLevel(), "2");
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::AddFile:MutexLock", "ExternalSSTFileTest::PickedLevelBug:0"},
{{"DBImpl::IngestExternalFile:AfterIncIngestFileCounter",
"ExternalSSTFileTest::PickedLevelBug:0"},
{"ExternalSSTFileTest::PickedLevelBug:1", "DBImpl::AddFile:MutexUnlock"},
{"ExternalSSTFileTest::PickedLevelBug:2",
"DBImpl::RunManualCompaction:0"},
@ -1333,10 +1336,14 @@ TEST_F(ExternalSSTFileTest, PickedLevelBug) {
// wait for 2 seconds to give a chance for compactions to run during
// this period, and then make sure that no compactions where able to run
env_->SleepForMicroseconds(1000000 * 2);
ASSERT_FALSE(bg_compact_started.load());
bool bg_compact_started_tmp = bg_compact_started.load();
// Hold AddFile from finishing writing the MANIFEST
TEST_SYNC_POINT("ExternalSSTFileTest::PickedLevelBug:1");
// check the status at the end, so even if the ASSERT fails the threads
// could be joined and return.
ASSERT_FALSE(bg_compact_started_tmp);
}
ASSERT_OK(bg_addfile_status);