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Date: Tue, 3 Mar 2015 18:37:04 +0000 (UTC)
From: "stack (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HBASE-13145) TestNamespaceAuditor.testRegionMerge
 is flaky
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     [ https://issues.apache.org/jira/browse/HBASE-13145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-13145:
--------------------------
       Resolution: Fixed
    Fix Version/s: 1.1.0
                   2.0.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

Pushed to master. Pushed the HRegion fix to branch-1. Thanks for the patch [~Apache9]

> TestNamespaceAuditor.testRegionMerge is flaky
> ---------------------------------------------
>
>                 Key: HBASE-13145
>                 URL: https://issues.apache.org/jira/browse/HBASE-13145
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 2.0.0, 1.1.0
>            Reporter: zhangduo
>            Assignee: zhangduo
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-13145.patch, HBASE-13145.patch
>
>
> Dig into the log
> https://builds.apache.org/job/HBase-TRUNK/6197/artifact/hbase-server/target/surefire-reports/org.apache.hadoop.hbase.namespace.TestNamespaceAuditor-output.txt
> Seems a split operation which we expect to success is started before we finishing a merge and cause an infinite sleep loop.
> I guess the problem is here
> {code:title=TestNamespaceAuditor.java}
>     // merge the two regions
>     admin.mergeRegions(hris.get(0).getEncodedNameAsBytes(),
>       hris.get(1).getEncodedNameAsBytes(), false);
>     
>     while (admin.getTableRegions(tableTwo).size() == initialRegions) {
>       Thread.sleep(100);
>     }
> {code}
> I guess that during a merge, we can get more region count than before because we first online the new region and then offline the two old regions.
> So change it to admin.getTableRegions(tableTwo).size() != initialRegions - 1 may work.
> And we can modify the while loop to use Waiter.waitFor which can provide more useful information when test failed.


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