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https://issues.apache.org/jira/browse/HBASE-8169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621708#comment-13621708
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Lars Hofhansl commented on HBASE-8169:
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+1 will commit unless there are objections.
[~jeffreyz] The attached patch is for 0.94. I assume this is an issue in 0.95
and trunk as well?
> TestMasterFailover#testMasterFailoverWithMockedRITOnDeadRS may fail due to
> regions randomly assigned to a RS
> ------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-8169
> URL: https://issues.apache.org/jira/browse/HBASE-8169
> Project: HBase
> Issue Type: Bug
> Components: test
> Affects Versions: 0.98.0, 0.94.7
> Reporter: Jeffrey Zhong
> Assignee: Jeffrey Zhong
> Priority: Minor
> Fix For: 0.94.7
>
> Attachments: hbase-8169.patch, RegionAssignedRandomly.txt
>
>
> In the test case, we use "master.assignRegion(hri);" to assign regions to
> live RS or dead RS(will be aborted during the test). While
> master.assignRegion may not always successfully assign a region to the
> expected RS due to following error:
> 1) We firstly try to open a region in region server, let's say RS1
> 2) For some reason the region open takes more than a time out period
> 3) AM tries to reassign it and force a new plan due to the time out
> 4) the Region is re-assigned to a random RS
> Then it cause the test case failure due to regions setup isn't in expected
> state.
> I attached a log with extra added logging info and some stack traces(with
> (new Exception()).printStackTrace() so you can ignore java.lang.Exception).
> You can search region 36716be644bc9c78b3a96e0d4a43c183 to see
> master.assignRegion assigned a region to a randome RS. I saw the test failed
> once in 5 times in a loop.
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