[HBASE-21416] Intermittent TestRegionInfoDisplay failure due to shift in relTime of RegionState#toDescriptiveString

• Type: Test
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Hadoop Flags: Reviewed
• Assignee: Norbert Kalmár
• Reporter: Ted Yu
• Created: 31/Oct/18 22:29
• Updated: 09/Mar/19 06:43
• Resolved: 08/Mar/19 17:20

Description

Over https://builds.apache.org/job/HBase-Flaky-Tests/job/branch-2.1/1799/testReport/junit/org.apache.hadoop.hbase.client/TestRegionInfoDisplay/testRegionDetailsForDisplay/ :

org.junit.ComparisonFailure: expected:<...:30 UTC 2018 (PT0.00[6]S ago), server=null> but was:<...:30 UTC 2018 (PT0.00[7]S ago), server=null>
	at org.apache.hadoop.hbase.client.TestRegionInfoDisplay.testRegionDetailsForDisplay(TestRegionInfoDisplay.java:78)

Here is how toDescriptiveString composes relTime:

    long relTime = System.currentTimeMillis() - stamp;

In the test, state.toDescriptiveString() is called twice for the assertion where different return values from System.currentTimeMillis() caused the assertion to fail in the above occasion.