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From "Buttler, David" <buttl...@llnl.gov>
Subject hbase error caused by DFS timeout
Date Mon, 09 Aug 2010 17:02:52 GMT
Hi all,
I seem to get this error far too frequently:

2010-08-09 09:54:03,685 INFO org.apache.hadoop.hbase.regionserver.Store: Started compaction
of 1 file(s) in annotations of doc,293817e024ed1d54a11e9e7c9b836dd837badbbc,1281372823189,
hasReferences=true, into /hbase/doc/compaction.dir/237345967, seqid=1182913218
2010-08-09 09:54:03,784 WARN org.apache.hadoop.hdfs.DFSClient: DFSOutputStream ResponseProcessor
exception  for block blk_-4556852958383799371_431518java.net.SocketTimeoutException: 6000
millis timeout while waiting for channel to be ready for read. ch : java.nio.channels.SocketChannel[connected
local=/ remote=/]
        at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
        at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
        at java.io.DataInputStream.readFully(DataInputStream.java:178)
        at java.io.DataInputStream.readLong(DataInputStream.java:399)
        at org.apache.hadoop.hdfs.protocol.DataTransferProtocol$PipelineAck.readFields(DataTransferProtocol.java:119)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$ResponseProcessor.run(DFSClient.java:2424)

This basically is taking one of clusters down consistently.  Is there an obvious thing I can
do about this?
I have seen this across three different clusters with radically different hardware, leading
me to believe that I have misconfigured something in either hbase or hdfs

Any ideas of where to look?


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