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Liu Shaohui commented on HBASE-10867: ------------------------------------- [~yuzhih...@gmail.com] The patch does fix the failed test. But, the root cause of the issue is that the Master is also a RegionServer since HBASE-10569. So the servers.length will be 11 and larger than the SLAVES:10 in the test. {code} killIndex = random.nextInt(servers.length); {code} What about making the MiniHBaseCluster adjust to HBASE-10569? > 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 > Attachments: 10867-v1.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. -- This message was sent by Atlassian JIRA (v6.2#6252)