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From <ext-ranjit.chellappann...@nokia.com>
Subject Reg Randomn forest
Date Fri, 03 Jun 2011 11:15:59 GMT
Hi,

I tried to run Randomn forest for KDD data in the Hadoop cluster(CDH version 3) and ended
up with the following error during build forest:-

Exception in thread "main" java.lang.IllegalStateException: java.io.EOFException
        at org.apache.mahout.common.iterator.sequencefile.SequenceFileIterable.iterator(SequenceFileIterable.java:63)
        at org.apache.mahout.df.mapreduce.partial.PartialBuilder.processOutput(PartialBuilder.java:173)
        at org.apache.mahout.df.mapreduce.partial.PartialBuilder.parseOutput(PartialBuilder.java:121)
        at org.apache.mahout.df.mapreduce.Builder.build(Builder.java:324)
        at org.apache.mahout.df.mapreduce.BuildForest.buildForest(BuildForest.java:195)
        at org.apache.mahout.df.mapreduce.BuildForest.run(BuildForest.java:159)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.mahout.df.mapreduce.BuildForest.main(BuildForest.java:239)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:186)
Caused by: java.io.EOFException
        at java.io.DataInputStream.readFully(DataInputStream.java:180)
        at java.io.DataInputStream.readFully(DataInputStream.java:152)
        at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1457)
        at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1435)
        at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1424)
        at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1419)
        at org.apache.mahout.common.iterator.sequencefile.SequenceFileIterator.<init>(SequenceFileIterator.java:58)
        at org.apache.mahout.common.iterator.sequencefile.SequenceFileIterable.iterator(SequenceFileIterable.java:61)
        ... 12 more

Any help in resolving the above issue is greatly appreciated.

Thanks and Regards,
Ranjit.C

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