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https://issues.apache.org/jira/browse/HBASE-20368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433501#comment-16433501
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Xiaolin Ha commented on HBASE-20368:
------------------------------------

I think there are some problems of UTs in hbase-rsgroup of branch-2.0. I run 
`mvn test` without any change of the codes of branch-2.0 and it shows
[INFO] Results:
[INFO] 
[ERROR] Errors: 
[ERROR]   TestEnableRSGroup.setUp:57 » IO Shutting down
[ERROR]   TestRSGroups.setUp:82 » IO Shutting down
[ERROR]   TestRSGroupsOfflineMode.setUp:86 » IO Shutting down
[ERROR] 
org.apache.hadoop.hbase.rsgroup.TestRSGroupsWithACL.org.apache.hadoop.hbase.rsgroup.TestRSGroupsWithACL
[ERROR]   Run 1: TestRSGroupsWithACL.setupBeforeClass:111 » IO Shutting down
[ERROR]   Run 2: 
TestRSGroupsWithACL.tearDownAfterClass:202->cleanUp:189->SecureTestUtil.deleteTable:709->SecureTestUtil.deleteTable:726
 » NullPointer
[INFO] 
[INFO] 
[ERROR] Tests run: 4, Failures: 0, Errors: 4, Skipped: 0


> Fix RIT stuck when a rsgroup has no online servers but AM's 
> pendingAssginQueue is cleared
> -----------------------------------------------------------------------------------------
>
>                 Key: HBASE-20368
>                 URL: https://issues.apache.org/jira/browse/HBASE-20368
>             Project: HBase
>          Issue Type: Bug
>          Components: rsgroup
>    Affects Versions: 2.0.0
>            Reporter: Xiaolin Ha
>            Assignee: Xiaolin Ha
>            Priority: Major
>         Attachments: HBASE-20368.branch-2.0.001.patch
>
>
> This error can be reproduced by shutting down all servers in a rsgroups and 
> starting them soon afterwards. 
> The regions on this rsgroup will be reassigned, but there is no available 
> servers of this rsgroup.
> They will be added to AM's pendingAssginQueue, which AM will clear regardless 
> of the result of assigning in this case.



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