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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3398) Client will not retry when primaryDN is down once it's just got pipeline
Date Tue, 29 May 2012 19:46:23 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285055#comment-13285055
] 

Uma Maheswara Rao G commented on HDFS-3398:
-------------------------------------------

I have just committed this to trunk and barnch-2. Thanks a lot, Amith for the patch.
                
> Client will not retry when primaryDN is down once it's just got pipeline
> ------------------------------------------------------------------------
>
>                 Key: HDFS-3398
>                 URL: https://issues.apache.org/jira/browse/HDFS-3398
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 2.0.0-alpha
>            Reporter: Brahma Reddy Battula
>            Assignee: amith
>            Priority: Minor
>             Fix For: 2.0.1-alpha, 3.0.0
>
>         Attachments: HDFS-3398.patch, HDFS-3398.patch, HDFS_3398_3.patch
>
>
> Scenario:
> =========
> Start NN and three DN"S
> Get the datanode to which blocks has to be replicated.
> from 
> {code}
> nodes = nextBlockOutputStream(src);
> {code}
> Before start writing to the DN ,kill the primary DN.
> {code}
> // write out data to remote datanode
>           blockStream.write(buf.array(), buf.position(), buf.remaining());
>           blockStream.flush();
> {code}
> Now write will fail with the exception 
> {noformat}
> 2012-05-10 14:21:47,993 WARN  hdfs.DFSClient (DFSOutputStream.java:run(552)) - DataStreamer
Exception
> java.io.IOException: An established connection was aborted by the software in your host
machine
> 	at sun.nio.ch.SocketDispatcher.write0(Native Method)
> 	at sun.nio.ch.SocketDispatcher.write(Unknown Source)
> 	at sun.nio.ch.IOUtil.writeFromNativeBuffer(Unknown Source)
> 	at sun.nio.ch.IOUtil.write(Unknown Source)
> 	at sun.nio.ch.SocketChannelImpl.write(Unknown Source)
> 	at org.apache.hadoop.net.SocketOutputStream$Writer.performIO(SocketOutputStream.java:60)
> 	at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
> 	at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:151)
> 	at org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:112)
> 	at java.io.BufferedOutputStream.write(Unknown Source)
> 	at java.io.DataOutputStream.write(Unknown Source)
> 	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:513)
> {noformat}
> .

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