Hello!, I am working with genetics algorithms in Mahout. Specifically I am trying to use the "MahoutEvaluator" to evaluate my own FitnessEvaluator based on the DummyEvaluator. The problem is that if I execute the program sequentially without hadoop ($ java -jar geneticoJose2.jar) the program finish correctly, but if I try to execute it in a pseudo-distributed mode ($ /home/jose/Descargas/hadoop-0.20.203.0/bin/hadoop jar geneticoJose2.jar) an error occurs:
Exception in thread "main" 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$Reader.init(SequenceFile.java:1450) at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1428) at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1353) at org.apache.hadoop.io.SequenceFile$Sorter$SegmentDescriptor.nextRawKey(SequenceFile.java:3072) at org.apache.hadoop.io.SequenceFile$Sorter$MergeQueue.merge(SequenceFile.java:2887) at org.apache.hadoop.io.SequenceFile$Sorter.merge(SequenceFile.java:2616) at org.apache.hadoop.io.SequenceFile$Sorter.merge(SequenceFile.java:2587) at org.apache.hadoop.io.SequenceFile$Sorter.merge(SequenceFile.java:2701) at org.apache.mahout.ga.watchmaker.OutputUtils.importEvaluations(OutputUtils.java:77) at org.apache.mahout.ga.watchmaker.MahoutEvaluator.evaluate(MahoutEvaluator.java:79) at es.udc.tic.world.Poblacion.actualizarFitness(Poblacion.java:68) at Principal.main(Principal.java:55) 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:156) Does anybody know why it happens? Could this be produced by incompatibilities between Mahout and Hadoop versions? Thank you in advance.
