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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3936) MiniDFSCluster shutdown may fail due to BlocksMap#getBlockCollection NPE
Date Fri, 14 Sep 2012 09:31:07 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13455688#comment-13455688

Hadoop QA commented on HDFS-3936:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 2 new or modified test files.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    -1 core tests.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:


    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3191//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3191//console

This message is automatically generated.
> MiniDFSCluster shutdown may fail due to BlocksMap#getBlockCollection NPE
> ------------------------------------------------------------------------
>                 Key: HDFS-3936
>                 URL: https://issues.apache.org/jira/browse/HDFS-3936
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-3936.txt
> Looks like HDFS-3664 didn't fix the whole issue because the added join times out because
the thread closing the BM (FSN#stopCommonServices) holds the FSN lock while closing the BM
and the BM is block uninterruptedly trying to aquire the FSN lock.
> {noformat}
> 2012-09-13 18:54:12,526 FATAL hdfs.MiniDFSCluster (MiniDFSCluster.java:shutdown(1355))
- Test resulted in an unexpected exit
> org.apache.hadoop.util.ExitUtil$ExitException: Fatal exception with message null
> stack trace
> java.lang.NullPointerException
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlocksMap.getBlockCollection(BlocksMap.java:101)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeReplicationWorkForBlocks(BlockManager.java:1132)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeReplicationWork(BlockManager.java:1107)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeDatanodeWork(BlockManager.java:3061)
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$ReplicationMonitor.run(BlockManager.java:3023)
> 	at java.lang.Thread.run(Thread.java:662)
> {noformat}

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