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https://issues.apache.org/jira/browse/HBASE-22424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841057#comment-16841057
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Guanghao Zhang commented on HBASE-22424:
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+1. Let me commit it later.
> Interactions in RSGroup test classes will cause
> TestRSGroupsAdmin2.testMoveServersAndTables and
> TestRSGroupsBalance.testGroupBalance flaky
> --------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-22424
> URL: https://issues.apache.org/jira/browse/HBASE-22424
> Project: HBase
> Issue Type: Bug
> Components: rsgroup
> Affects Versions: 2.2.0
> Reporter: Xiaolin Ha
> Assignee: Xiaolin Ha
> Priority: Major
> Attachments: HBASE-22424.master.001.patch
>
>
> When running rsgroup test class folder to run all the UTs together,
> TestRSGroupsAdmin2.testMoveServersAndTables and
> TestRSGroupsBalance.testGroupBalance will flaky.
> Because TestRSGroupsAdmin1, TestRSGroupsAdmin2 and TestRSGroupsBalance are
> all extends TestRSGroupsBase, which has a static variable INIT, controlling
> the initialize of 'master 'group and the number of rs in 'default' rsgroup.
> Output errors of TestRSGroupsBalance.testGroupBalance is shown in
> HBASE-22420, and TestRSGroupsAdmin2.testMoveServersAndTables will encounter
> NPE in
> ```rsGroupAdmin.getRSGroupInfo("master").containsServer(server.getAddress())```
> because `master` group has not been added.
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