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https://issues.apache.org/jira/browse/HBASE-10867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13956756#comment-13956756
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stack commented on HBASE-10867:
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That makes sense. Thanks. I missed [~liushaohui]'s comment (was focused on
your remarks looking for explanation...)
> TestRegionPlacement#testRegionPlacement occasionally fails
> ----------------------------------------------------------
>
> Key: HBASE-10867
> URL: https://issues.apache.org/jira/browse/HBASE-10867
> Project: HBase
> Issue Type: Test
> Reporter: Ted Yu
> Assignee: Ted Yu
> Priority: Minor
> Fix For: 0.99.0
>
> Attachments: 10867-v1.txt, 10867-v2.txt
>
>
> From
> https://builds.apache.org/job/HBase-TRUNK/5047/testReport/org.apache.hadoop.hbase.master/TestRegionPlacement/testRegionPlacement/
> :
> {code}
> java.lang.ArrayIndexOutOfBoundsException: 10
> at
> java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:368)
> at
> java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:377)
> at
> org.apache.hadoop.hbase.LocalHBaseCluster.getRegionServer(LocalHBaseCluster.java:224)
> at
> org.apache.hadoop.hbase.MiniHBaseCluster.getRegionServer(MiniHBaseCluster.java:609)
> at
> org.apache.hadoop.hbase.master.TestRegionPlacement.killRandomServerAndVerifyAssignment(TestRegionPlacement.java:303)
> at
> org.apache.hadoop.hbase.master.TestRegionPlacement.testRegionPlacement(TestRegionPlacement.java:270)
> {code}
> In the setup:
> {code}
> TEST_UTIL.startMiniCluster(SLAVES);
> {code}
> where SLAVES is 10.
> So when 10 was used in
> TEST_UTIL.getHBaseCluster().getRegionServer(killIndex), we would get
> ArrayIndexOutOfBoundsException.
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