[HBASE-24159] [flakey test] regionserver.TestRegionMergeTransactionOnCluster

• Type: Test
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.3.0, 2.4.0
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Component/s: regionserver
• Assignee: Huaxiang Sun
• Reporter: Huaxiang Sun
• Created: 09/Apr/20 19:07
• Updated: 14/Jul/20 18:26
• Resolved: 10/Apr/20 20:03

Description

As reported in https://builds.apache.org/view/H-L/view/HBase/job/HBase-Find-Flaky-Tests/job/branch-2.3/lastSuccessfulBuild/artifact/dashboard.html#job_1, 

testCleanMergeReference fails when waiting for merge table in meta table to be cleaned.

Debugged a bit, found that this is case that state is polluted from other testing cases.

 

the meta table is polluted from the previous region merge test cases (tables are not deleted after the testing case finishes). While compaction still goes on and janitor kicks in, it will clean up the old table state and breaks the loop (cleaned > 0), so leave the state under test never cleaned up.The solution is to delete tables after each test case.

Issue Links

• links to: GitHub Pull Request #1472
• links to: GitHub Pull Request #1474
• links to: GitHub Pull Request #1475