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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3398) Client will not retry when primaryDN is down once it's just got pipeline
Date Thu, 10 May 2012 14:58:49 GMT
Brahma Reddy Battula created HDFS-3398:

             Summary: 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: Task
    Affects Versions: 2.0.0
            Reporter: Brahma Reddy Battula
            Priority: Minor
             Fix For: 3.0.0

Start NN and three DN"S

Get the datanode to which blocks has to be replicated.
nodes = nextBlockOutputStream(src);

Before start writing to the DN ,kill the primary DN.
// write out data to remote datanode
          blockStream.write(buf.array(), buf.position(), buf.remaining());

Now write will fail with the exception 

2012-05-10 14:21:47,993 WARN  hdfs.DFSClient (DFSOutputStream.java:run(552)) - DataStreamer
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)



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