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From Ion Badita <ion.bad...@mcr.ro>
Subject java.lang.NullPointerException im Sortetr/MergeQueue
Date Fri, 02 Feb 2007 12:07:27 GMT
Hi!

I tried to run wordcount example with a 1,9 GB input file, on 6 Nodes.
Hadoop has split the job in: 31 maps and one reduce.

All the maps fail with this stacktrace

java.lang.NullPointerException
	at org.apache.hadoop.io.SequenceFile$Sorter$MergeQueue.merge(SequenceFile.java:2394)
	at org.apache.hadoop.io.SequenceFile$Sorter.merge(SequenceFile.java:2087)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.mergeParts(MapTask.java:498)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:191)
	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1372)


I tried the example with hadoop 0.10.1 and nightly build hadoop-2007-02-02 (with the same
input), i got the same exception.

Any help will be appreciated.
Thanks!

John


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