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From Steve Lewis <lordjoe2...@gmail.com>
Subject Map Rask has IO exception
Date Sat, 05 Nov 2011 17:09:37 GMT
My job is dying during a  map task write. This happened in enough task
to kill the job although most tasks succeeded -

Any ideas as to where to start diagnosing the problem



Caused by: java.lang.NullPointerException
	at org.apache.hadoop.io.compress.BZip2Codec$BZip2CompressionOutputStream.write(BZip2Codec.java:200)
	at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:41)
	at java.io.DataOutputStream.writeByte(DataOutputStream.java:136)
	at org.apache.hadoop.io.WritableUtils.writeVLong(WritableUtils.java:263)
	at org.apache.hadoop.io.WritableUtils.writeVInt(WritableUtils.java:243)
	at org.apache.hadoop.mapred.IFile$Writer.close(IFile.java:126)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1242)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$1800(MapTask.java:648)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1135)



-- 
Steven M. Lewis PhD
4221 105th Ave NE
Kirkland, WA 98033
206-384-1340 (cell)
Skype lordjoe_com

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