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
