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From "Buttler, David" <buttl...@llnl.gov>
Subject Error in shutdown of region servers
Date Tue, 15 Jun 2010 00:44:39 GMT
Have you seen this error in shutting down a region server:

2010-06-14 17:17:39,521 ERROR org.apache.hadoop.hdfs.DFSClient: Exception closing file /hbase/doc/compaction.dir/1341061960/4230672672594086608
: java.net.SocketTimeoutException: 9000 millis timeout while waiting for channel to be ready
for read. ch : java.nio.channels.SocketChannel[connected local=/10.0.1.5:48512 remote=/10.0.1.5:50010]
java.net.SocketTimeoutException: 9000 millis timeout while waiting for channel to be ready
for read. ch : java.nio.channels.SocketChannel[connected local=/10.0.1.5:48512 remote=/10.0.1.5:50010]
        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 org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:116)
        at java.io.DataInputStream.readByte(DataInputStream.java:248)
        at org.apache.hadoop.io.WritableUtils.readVLong(WritableUtils.java:298)
        at org.apache.hadoop.io.WritableUtils.readVInt(WritableUtils.java:319)
        at org.apache.hadoop.io.Text.readString(Text.java:400)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.createBlockOutputStream(DFSClient.java:2901)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2826)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288)


Any thoughts as to a possible cause?  I see this on several of my region server logs when
I shutdown today (I wanted to move my JVM to jdk1.6.0_20).  Sometimes more than once in a
single log.

Dave



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