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From "Billy Pearson" <sa...@pearsonwholesale.com>
Subject region server hanging
Date Thu, 05 Jun 2008 08:33:05 GMT
I see the below error a lot when the region server seams to just stop and 
wait a few secs to a min then it go's on like nothing happened sometimes 
hangeing my MR task but these errors are the only thing I can find wrong.

Any one know any more about this error?

2008-06-05 03:16:03,666 ERROR org.apache.hadoop.dfs.DataNode: 
xx.xx.xx.211:50010:DataXceiver: java.net.SocketTimeoutException: 480000 
millis timeout while waiting for channel to be ready for write. ch : 
java.nio.channels.SocketChannel[connected local=/xx.xx.xx.211:50010 
remote=/xx.xx.xx.211:49653]
        at 
org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:170)
        at 
org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:144)
        at 
org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:105)
        at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105)
        at java.io.DataOutputStream.write(DataOutputStream.java:90)
        at 
org.apache.hadoop.dfs.DataNode$BlockSender.sendChunks(DataNode.java:1774)
        at 
org.apache.hadoop.dfs.DataNode$BlockSender.sendBlock(DataNode.java:1813)
        at 
org.apache.hadoop.dfs.DataNode$DataXceiver.readBlock(DataNode.java:1039)
        at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:968)
        at java.lang.Thread.run(Thread.java:619)



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