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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2756) NPE in DFSClient in hbase under load
Date Wed, 05 Mar 2008 20:07:40 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575483#action_12575483

Hadoop QA commented on HADOOP-2756:

-1 overall.  Here are the results of testing the latest attachment 
against trunk revision 619744.

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

    tests included -1.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

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

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

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

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

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1896/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1896/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1896/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1896/console

This message is automatically generated.

> NPE in DFSClient in hbase under load
> ------------------------------------
>                 Key: HADOOP-2756
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2756
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: stack
>            Assignee: Raghu Angadi
>            Priority: Minor
>             Fix For: 0.16.1
>         Attachments: HADOOP-2756.patch, HADOOP-2756.patch
> Saw this in logs:
> {code}
> 2008-01-31 18:55:02,128 ERROR org.apache.hadoop.hbase.HRegionServer: Compaction failed
for region TestTable,0009438931,1201805282651
> java.lang.NullPointerException
>         at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.close(DFSClient.java:2262)
>         at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:51)
>         at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:67)
>         at org.apache.hadoop.hbase.HStoreFile.writeInfo(HStoreFile.java:365)
>         at org.apache.hadoop.hbase.HStore.compact(HStore.java:1236) 
>         at org.apache.hadoop.hbase.HRegion.compactStores(HRegion.java:775)
>         at org.apache.hadoop.hbase.HRegion.compactIfNeeded(HRegion.java:707)
>         at org.apache.hadoop.hbase.HRegionServer$CompactSplitThread.run(HRegionServer.java:253)
> {code}
> Look to see if the response data method needs to be made volatile (There's a test for
null just before we use it on line #2262).

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