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Date: Wed, 5 Mar 2008 14:03:41 -0800 (PST)
From: "Raghu Angadi (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-2756) NPE in DFSClient in hbase under load
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     [ https://issues.apache.org/jira/browse/HADOOP-2756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Raghu Angadi updated HADOOP-2756:
---------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I just committed this.

> 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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