I am trying to run the lda (now called cvb) function, I followed the steps listed in many online sources. the final step after getting the lda result, to show the result in a human-readable form is doing this vectordump, but it gave me the following exception:
I also listed the first few bytes of my cvb output file, looks to be at least not empty. Thanks! yang sh-3.2$ bin/mahout vectordump -i MAHOUT/cvb/part-m-00000 --dictionary sparse/dictionary.file-0 --dictionaryType sequencefile --vectorSize 10 -o cvbout Running on hadoop, using /apache/hadoop/bin/hadoop and HADOOP_CONF_DIR= MAHOUT-JOB: /home/yyang15/mahout/mahout-distribution-0.8/mahout-examples-0.8-job.jar 14/01/08 16:37:03 INFO common.AbstractJob: Command line arguments: {--dictionary=[sparse/dictionary.file-0], --dictionaryType=[sequencefile], --endPhase=[2147483647], --input=[MAHOUT/cvb/part-m-00000], --output=[cvbout], --startPhase=[0], --tempDir=[temp], --vectorSize=[10]} 14/01/08 16:37:04 INFO vectors.VectorDumper: Sort? false Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at org.apache.mahout.utils.vectors.VectorHelper$2.apply(VectorHelper.java:132) at org.apache.mahout.utils.vectors.VectorHelper$2.apply(VectorHelper.java:129) at com.google.common.collect.Iterators$8.next(Iterators.java:812) at java.util.AbstractCollection.toArray(AbstractCollection.java:124) at java.util.ArrayList.<init>(ArrayList.java:131) at com.google.common.collect.Lists.newArrayList(Lists.java:119) at org.apache.mahout.utils.vectors.VectorHelper.toWeightedTerms(VectorHelper.java:128) at org.apache.mahout.utils.vectors.VectorHelper.vectorToJson(VectorHelper.java:147) at org.apache.mahout.utils.vectors.VectorDumper.run(VectorDumper.java:240) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.mahout.utils.vectors.VectorDumper.main(VectorDumper.java:260) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68) at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:194) 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:160) SEQ^F org.apache.hadoop.io.IntWritable%org.apache.mahout.math.VectorWritable^@^@^@^@^@^@%<D3>NX<97><A9><FD><BB>a;H<98>KȪ<82>^@^A!^G^@^@^@^D^@^@^@^@^C<A0>H=<B6>g<9C>O <EF>^?<D8>=ˍ<8A><F1>-<AC>8=ɪA+<E0><F1>^R=<AC>-^Ck<BE>^Cm=<F4>p-<E0>ul<D3>=<BA><FE>H7T<F6>^B=<D7>E<EC><95>RH<A7>=<BB>U<DE>^B^Y"<F1>=<D9>WV^F"^P^Q=հ`^?8^N<F1>=<D6>b^YJ <91><A0>$=<BB><94><F1><C6>^S?c=<B1><BA><88>^G<EB>i^P=<9B>^N>R<92><D2>q=<BA>^H,<9E>^_<B3><91>=<CE><ED> i<C1>^FA=<F4>6<9F><A6><BF>^V[=<9F><E8>IN<A4>L<D5>=<B4><E5><F4>j <83><A0>I=<F4>p<AB>֣%<80>=<A3>'^A<AB><8B>=<A9>=<A4>^V<DB>3<80>^M<B7>=<B5>A^SV^Eͺ?4 ^K0^\<9D><BA>=<AA><86>l<8B><F4><E8>m^@^@^@^@^@^@^@^@=<C4>w^NjK<BF> =<AB>"^O;!<E0><F7>=<AF><BC>R<DC>-