[HBASE-25157] TestMasterRegionCompaction is flaky

• Type: Test
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0-alpha-1
• Component/s: master, test
• Assignee: Unassigned
• Reporter: Nick Dimiduk
• Created: 05/Oct/20 21:34
• Updated: 05/Oct/20 21:34

Description

[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 10.298 s <<< FAILURE! - in org.apache.hadoop.hbase.master.region.TestMasterRegionCompaction
[ERROR] org.apache.hadoop.hbase.master.region.TestMasterRegionCompaction.test  Time elapsed: 10.269 s  <<< FAILURE!
java.lang.AssertionError: expected:<1> but was:<4>
	at org.apache.hadoop.hbase.master.region.TestMasterRegionCompaction.test(TestMasterRegionCompaction.java:136)

This test uses calls to Thread.sleep of fixed durations instead of the waitFor pattern of retries. It's looking for side-effects of a background thread that may not be scheduled on precisely the cadence that the test expects, especially in an overloaded test environment.