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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8169) TestMaster#testMasterFailoverWithMockedRITOnDeadRS may fail due to regions may randomly be assigned to a RS
Date Thu, 21 Mar 2013 18:09:18 GMT
Jeffrey Zhong created HBASE-8169:
------------------------------------

             Summary: TestMaster#testMasterFailoverWithMockedRITOnDeadRS may fail due to regions
may randomly be 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


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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