[HBASE-25156] TestMasterFailover.testSimpleMasterFailover is flaky - ASF JIRA

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Details

Type: Test
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: 3.0.0-alpha-1
Fix Version/s: 3.0.0-alpha-1, 2.3.3, 1.7.0, 2.4.0, 2.2.7
Component/s: test
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Description

[ERROR] Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 32.996 s <<< FAILURE! - in org.apache.hadoop.hbase.master.TestMasterFailover
[ERROR] org.apache.hadoop.hbase.master.TestMasterFailover.testSimpleMasterFailover  Time elapsed: 12.317 s  <<< FAILURE!
java.lang.AssertionError: expected:<1> but was:<2>
	at org.apache.hadoop.hbase.master.TestMasterFailover.testSimpleMasterFailover(TestMasterFailover.java:133)

Looks like this test depends on metrics to be updated as a source of side-effect used to verify the test. Seems like it should retry the check a few times, or maybe we need a last-updated monotonic value that the test can check before and after it expects a change to be visible.