[jira] [Resolved] (HBASE-25334) TestRSGroupsFallback.testFallback is flaky

["Michael Stack (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-25334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Stack resolved HBASE-25334.
-----------------------------------
    Fix Version/s: 2.4.1
                   2.5.0
                   3.0.0-alpha-1
     Hadoop Flags: Reviewed
       Resolution: Fixed

Pushed branch-2 PR to branch-2.4 and branch-2 (Another PR had already been applied to master). Resolving after testing locally against branch-2. This patch seems to have cured the failure I've been seeing running unit tests locally. Thanks [~Xiaolin Ha] for the gnarly fix.

> TestRSGroupsFallback.testFallback is flaky
> ------------------------------------------
>
>                 Key: HBASE-25334
>                 URL: https://issues.apache.org/jira/browse/HBASE-25334
>             Project: HBase
>          Issue Type: Test
>            Reporter: Xiaolin Ha
>            Assignee: Xiaolin Ha
>            Priority: Major
>             Fix For: 3.0.0-alpha-1, 2.5.0, 2.4.1
>
>         Attachments: 1607918235175-image.png, image-2020-12-13-10-15-55-445.png
>
>
> Like in CI test results of PR [https://github.com/apache/hbase/pull/2699]
> failed UTs site is [https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-2699/3/artifact/yetus-jdk8-hadoop3-check/output/patch-unit-hbase-server.txt]
>  
> In this unit test, it checks if all table regions assigned after balance, and then assert for the RS group of regions.
> But balance() uses aync move, and will throttle move regions, sleeping between all the table regions are moved to its RSGroup.
> If waiting time is not longer than the region movement duration, the assertion will be fail.



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