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https://issues.apache.org/jira/browse/HBASE-6958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473387#comment-13473387
]
ramkrishna.s.vasudevan commented on HBASE-6958:
-----------------------------------------------
I was looking thro this. As per the failing testcase it should not use the
MockLoadBalancer itself. Strange.
But the reason could be MockLoadBalancer is not reverted back to normal
balancer in one of the testcase which uses MockLoadBalancer. Added to that i
was not able to reproduce the issue in my machine.
> TestAssignmentManager sometimes fails in trunk
> ----------------------------------------------
>
> Key: HBASE-6958
> URL: https://issues.apache.org/jira/browse/HBASE-6958
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Fix For: 0.96.0
>
>
> From
> https://builds.apache.org/job/HBase-TRUNK/3432/testReport/junit/org.apache.hadoop.hbase.master/TestAssignmentManager/testBalanceOnMasterFailoverScenarioWithOpenedNode/
> :
> {code}
> Stacktrace
> java.lang.Exception: test timed out after 5000 milliseconds
> at java.lang.System.arraycopy(Native Method)
> at java.lang.ThreadGroup.remove(ThreadGroup.java:969)
> at java.lang.ThreadGroup.threadTerminated(ThreadGroup.java:942)
> at java.lang.Thread.exit(Thread.java:732)
> ...
> 2012-10-06 00:46:12,521 DEBUG [MASTER_CLOSE_REGION-mockedAMExecutor-0]
> zookeeper.ZKUtil(1141): mockedServer-0x13a33892de7000e Retrieved 81 byte(s)
> of data from znode /hbase/unassigned/dc01abf9cd7fd0ea256af4df02811640 and set
> watcher; region=t,,1349484359011.dc01abf9cd7fd0ea256af4df02811640.,
> state=M_ZK_REGION_OFFLINE, servername=master,1,1, createTime=1349484372509,
> payload.length=0
> 2012-10-06 00:46:12,522 ERROR [MASTER_CLOSE_REGION-mockedAMExecutor-0]
> executor.EventHandler(205): Caught throwable while processing event
> RS_ZK_REGION_CLOSED
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.TestAssignmentManager$MockedLoadBalancer.randomAssignment(TestAssignmentManager.java:773)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.getRegionPlan(AssignmentManager.java:1709)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.getRegionPlan(AssignmentManager.java:1666)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1435)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1155)
> at
> org.apache.hadoop.hbase.master.TestAssignmentManager$AssignmentManagerWithExtrasForTesting.assign(TestAssignmentManager.java:1035)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1130)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1125)
> at
> org.apache.hadoop.hbase.master.handler.ClosedRegionHandler.process(ClosedRegionHandler.java:106)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:202)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> 2012-10-06 00:46:12,522 DEBUG [pool-1-thread-1-EventThread]
> master.AssignmentManager(670): Handling transition=M_ZK_REGION_OFFLINE,
> server=master,1,1, region=dc01abf9cd7fd0ea256af4df02811640, current state
> from region state map ={t,,1349484359011.dc01abf9cd7fd0ea256af4df02811640.
> state=OFFLINE, ts=1349484372508, server=null}
> {code}
> Looks like NPE happened on this line:
> {code}
> this.gate.set(true);
> {code}
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