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https://issues.apache.org/jira/browse/HDFS-3384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273175#comment-13273175
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amith commented on HDFS-3384:
-----------------------------

Hi Todd/Nicholas/Uma can u have a look into my patch 

Thanks in Advance

                
> DataStreamer thread should be closed immediatly when failed to setup a 
> PipelineForAppendOrRecovery
> --------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3384
>                 URL: https://issues.apache.org/jira/browse/HDFS-3384
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 2.0.0
>            Reporter: Brahma Reddy Battula
>            Assignee: amith
>         Attachments: HDFS-3384.patch
>
>
> Scenraio:
> =========
> write a file
> corrupt block manually
> call append..
> {noformat}
> 2012-04-19 09:33:10,776 INFO  hdfs.DFSClient 
> (DFSOutputStream.java:createBlockOutputStream(1059)) - Exception in 
> createBlockOutputStream
> java.io.EOFException: Premature EOF: no length prefix available
>       at 
> org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:162)
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1039)
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:939)
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> 2012-04-19 09:33:10,807 WARN  hdfs.DFSClient (DFSOutputStream.java:run(549)) 
> - DataStreamer Exception
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:510)
> 2012-04-19 09:33:10,807 WARN  hdfs.DFSClient 
> (DFSOutputStream.java:hflush(1511)) - Error while syncing
> java.io.IOException: All datanodes 10.18.40.20:50010 are bad. Aborting...
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:908)
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> java.io.IOException: All datanodes 10.18.40.20:50010 are bad. Aborting...
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:908)
>       at 
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> {noformat}

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