I fixed the bug here https://issues.apache.org/jira/browse/MAHOUT-289
Try running now. Robin On Sat, Feb 13, 2010 at 1:09 AM, Ovidiu Dan <[email protected]> wrote: > I checked the code. > > Line 36 of LDAMapper.java references Vector: > > public class LDAMapper extends > Mapper<WritableComparable<?>, *Vector*, IntPairWritable, DoubleWritable> > { > > Aren't all elements in Mapper<...> supposed to be Writable? Do you need to > do a conversion to VectorWritable? > > Ovi > > --- > Ovidiu Dan - http://www.ovidiudan.com/ > > Please do not print this e-mail unless it is mandatory > > My public key can be downloaded from subkeys.pgp.net, or > http://www.ovidiudan.com/public.pgp > > > On Fri, Feb 12, 2010 at 2:32 PM, Ovidiu Dan <[email protected]> wrote: > > > > > Ok I did a clean checkout & install and ran everything again, then > pointed > > LDA to mahout_vectors/vectors. > > > > Now I get this error: > > > > 10/02/12 14:28:35 INFO mapred.JobClient: Task Id : > > attempt_201001192218_0216_m_000005_0, Status : FAILED > > java.lang.ClassCastException: *org.apache.mahout.math.VectorWritable > > cannot be cast to org.apache.mahout.math.Vector* > > at org.apache.mahout.clustering.lda.LDAMapper.map(LDAMapper.java:36) > > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:583) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305) > > at org.apache.hadoop.mapred.Child.main(Child.java:170) > > > > Ovi > > > > --- > > Ovidiu Dan - http://www.ovidiudan.com/ > > > > Please do not print this e-mail unless it is mandatory > > > > My public key can be downloaded from subkeys.pgp.net, or > > http://www.ovidiudan.com/public.pgp > > > > > > On Fri, Feb 12, 2010 at 1:50 PM, Robin Anil <[email protected]> > wrote: > > > >> Hi Ovidu, > >> If you choose tf, the vectors are generated in > >> outputfolder/vectors and if you choose tfidf the vectors are generated > in > >> outputfolder/tfidf/vectors. I am in the process of changing the code to > >> move > >> the output of the map/reduce to a fixed destination and that exception > >> would > >> have caused the folders not to move. > >> Thats the reason for the last error. > >> > >> For the first error, I am not sure what is happening. Could you do a > clean > >> compile of mahout > >> > >> mvn clean install -DskipTests=true and make sure you svn up the trunk > >> before > >> doing that > >> > >> Then point your LDA to mahout_vectors/vectors > >> > >> Robin > >> > >> > >> On Sat, Feb 13, 2010 at 12:14 AM, Ovidiu Dan <[email protected]> wrote: > >> > >> > Hi again, > >> > > >> > Is there any workaround for my problem(s)? Or is there any other way > >> that > >> > would allow me to transform many many small messages (they're Tweets) > >> into > >> > Mahout vectors, and the run LDA on them, without getting these errors? > >> > Converting them to txt files would be a bit of a pain because I would > >> get > >> > millions of very small files. And a Lucene index would be a bit > overkill > >> I > >> > think. > >> > > >> > Thanks, > >> > Ovi > >> > > >> > --- > >> > Ovidiu Dan - http://www.ovidiudan.com/ > >> > > >> > Please do not print this e-mail unless it is mandatory > >> > > >> > My public key can be downloaded from subkeys.pgp.net, or > >> > http://www.ovidiudan.com/public.pgp > >> > > >> > > >> > On Fri, Feb 12, 2010 at 3:51 AM, Robin Anil <[email protected]> > >> wrote: > >> > > >> > > Was meant for the dev list. I am looking into the first error > >> > > > >> > > -bcc mahout-user > >> > > > >> > > > >> > > ---------- Forwarded message ---------- > >> > > From: Robin Anil <[email protected]> > >> > > Date: Fri, Feb 12, 2010 at 2:20 PM > >> > > Subject: Re: Problem converting SequenceFile to vectors, then > running > >> LDA > >> > > To: [email protected] > >> > > > >> > > > >> > > Hi, > >> > > > >> > > This confusion arises from the fact that we use intermediate > >> folders > >> > > as subfolders under output folder. How about we standardize on all > the > >> > jobs > >> > > taking input, intermediate and output folder?. If not this then for > >> the > >> > > next > >> > > release? > >> > > > >> > > Robin > >> > > > >> > > > >> > > > >> > > > >> > > On Fri, Feb 12, 2010 at 10:46 AM, Ovidiu Dan <[email protected]> > >> wrote: > >> > > > >> > > > Hello Mahout developers / users, > >> > > > > >> > > > I am trying to convert a properly formatted SequenceFile to Mahout > >> > > vectors > >> > > > to run LDA on them. As reference I am using these two documents: > >> > > > http://cwiki.apache.org/MAHOUT/creating-vectors-from-text.html > >> > > > http://cwiki.apache.org/MAHOUT/latent-dirichlet-allocation.html > >> > > > > >> > > > I got the Mahout code from SVN on February 11th 2010. Below I am > >> > listing > >> > > > the > >> > > > steps I have took and the problems I have encountered: > >> > > > > >> > > > export HADOOP_HOME=/home/hadoop/hadoop/hadoop_install/ > >> > > > export > >> > MAHOUT_HOME=/home/hadoop/hadoop/hadoop_install/bin/ovi/lda/trunk/ > >> > > > > >> > > > $HADOOP_HOME/bin/hadoop jar > >> > > > $MAHOUT_HOME/examples/target/mahout-examples-0.3-SNAPSHOT.job > >> > > > org.apache.mahout.text.SparseVectorsFromSequenceFiles -i > >> > > > /user/MY_USERNAME/projects/lda/twitter_sequence_files/ -o > >> > > > /user/MY_USERNAME/projects/lda/mahout_vectors/ -wt tf -chunk 300 > -a > >> > > > org.apache.lucene.analysis.standard.StandardAnalyzer --minSupport > 2 > >> > > --minDF > >> > > > 1 --maxDFPercent 50 --norm 2 > >> > > > > >> > > > *Problem #1: *Got this error at the end, but I think everything > >> > finished > >> > > > more or less correctly: > >> > > > Exception in thread "main" java.lang.NoSuchMethodError: > >> > > > > >> > > > > >> > > > >> > > >> > org.apache.mahout.common.HadoopUtil.deletePath(Ljava/lang/String;Lorg/apache/hadoop/fs/FileSystem;)V > >> > > > at > >> > > > > >> > > > > >> > > > >> > > >> > org.apache.mahout.utils.vectors.text.DictionaryVectorizer.createTermFrequencyVectors(DictionaryVectorizer.java:173) > >> > > > at > >> > > > > >> > > > > >> > > > >> > > >> > org.apache.mahout.text.SparseVectorsFromSequenceFiles.main(SparseVectorsFromSequenceFiles.java:254) > >> > > > 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) > >> > > > > >> > > > $HADOOP_HOME/bin/hadoop jar > >> > > > $MAHOUT_HOME/examples/target/mahout-examples-0.3-SNAPSHOT.job > >> > > > org.apache.mahout.clustering.lda.LDADriver -i > >> > > > /user/MY_USERNAME/projects/lda/mahout_vectors/ -o > >> > > > /user/MY_USERNAME/projects/lda/lda_out/ -k 20 --numWords 100000 > >> > > > --numReducers 33 > >> > > > > >> > > > *Problem #2: *Exception in thread "main" > >> java.io.FileNotFoundException: > >> > > > File > >> > > > does not exist: > >> > > > > >> > > > > >> > > > >> > > >> > hdfs://SOME_SERVER:8003/user/MY_USERNAME/projects/lda/mahout_vectors/partial-vectors-0/data > >> > > > > >> > > > *Tried to fix:* > >> > > > > >> > > > ../../hadoop fs -mv > >> > > > > >> > > > >> > > >> > /user/MY_USERNAME/projects/lda/mahout_vectors/partial-vectors-0/part-00000 > >> > > > > /user/MY_USERNAME/projects/lda/mahout_vectors/partial-vectors-0/data > >> > > > > >> > > > *Ran again:* > >> > > > > >> > > > $HADOOP_HOME/bin/hadoop jar > >> > > > $MAHOUT_HOME/examples/target/mahout-examples-0.3-SNAPSHOT.job > >> > > > org.apache.mahout.clustering.lda.LDADriver -i > >> > > > /user/MY_USERNAME/projects/lda/mahout_vectors/ -o > >> > > > /user/MY_USERNAME/projects/lda/lda_out/ -k 20 --numWords 100000 > >> > > > --numReducers 33 > >> > > > > >> > > > *Problem #3:* > >> > > > > >> > > > Exception in thread "main" java.io.FileNotFoundException: File > does > >> not > >> > > > exist: > >> > > > > >> > > > > >> > > > >> > > >> > hdfs://SOME_SERVER:8003/user/MY_USERNAME/projects/lda/mahout_vectors/tokenized-documents/data > >> > > > > >> > > > [had...@some_server retweets]$ ../../hadoop fs -ls > >> > > > /user/MY_USERNAME/projects/lda/mahout_vectors/tokenized-documents/ > >> > > > Found 3 items > >> > > > -rw-r--r-- 3 hadoop supergroup 129721338 2010-02-11 23:54 > >> > > > > >> > > > > >> > > > >> > > >> > /user/MY_USERNAME/projects/lda/mahout_vectors/tokenized-documents/part-00000 > >> > > > -rw-r--r-- 3 hadoop supergroup 128256085 2010-02-11 23:54 > >> > > > > >> > > > > >> > > > >> > > >> > /user/MY_USERNAME/projects/lda/mahout_vectors/tokenized-documents/part-00001 > >> > > > -rw-r--r-- 3 hadoop supergroup 24160265 2010-02-11 23:54 > >> > > > > >> > > > > >> > > > >> > > >> > /user/MY_USERNAME/projects/lda/mahout_vectors/tokenized-documents/part-00002 > >> > > > > >> > > > Also, as a *bonus problem*, If the input > >> > > > folder /user/MY_USERNAME/projects/lda/twitter_sequence_files > >> contains > >> > > more > >> > > > than one file (for example if I run only the maps without a final > >> > > reducer), > >> > > > this whole chain doesn't work. > >> > > > > >> > > > Thanks, > >> > > > Ovi > >> > > > > >> > > > --- > >> > > > Ovidiu Dan - http://www.ovidiudan.com/ > >> > > > > >> > > > Please do not print this e-mail unless it is mandatory > >> > > > > >> > > > My public key can be downloaded from subkeys.pgp.net, or > >> > > > http://www.ovidiudan.com/public.pgp > >> > > > > >> > > > >> > > >> > > > > >
