mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: 'bin/mahout rowid' failing
Date Fri, 07 Oct 2011 15:36:35 GMT
Actually, if you are clustering books, the books should be rows.

On Fri, Oct 7, 2011 at 8:26 AM, Dan Brickley <danbri@danbri.org> wrote:

> Running from recent trunk, I can't get any sign of life from the
> 'rowid' command / job. Null Pointer Exception, even when just asking
> for --help. Details below.
>
> Also I tried running this more directly as 'mahout
> org.apache.mahout.utils.vectors.RowIdJob  --input
> sparse3/tfidf-vectors/part-r-00000  --output matrixified/' but no
> success there either.
>
> I'm trying to get my book code sparse vectors into a form that can be
> usefully SVD'd, now that I have made some successful / plausible
> clusters using those vectors. I think I need first to transpose them
> so my columns correspond to records/books not their subject codes, but
> the transpose job complained with type errors, and searching on those
> led me to discover the 'rowid' task, which I believe I need to use
> before I can transpose my matrix. So I seem to be stuck. Is rowid the
> thing to be using here?
>
> Dan
>
> TellyClub:bin danbri$ ./mahout rowid --help
> MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath.
> Running on hadoop, using
> HADOOP_HOME=/Users/danbri/working/hadoop/hadoop-0.20.2
> HADOOP_CONF_DIR=/Users/danbri/working/hadoop/hadoop-0.20.2/conf
> MAHOUT-JOB:
> /Users/danbri/working/mahout/trunk/examples/target/mahout-examples-0.6-SNAPSHOT-job.jar
> ^CTellyClub:bin danbri$ MAHOUT_LOCAL=true ./mahout rowid --help
> MAHOUT_LOCAL is set, so we don't add HADOOP_CONF_DIR to classpath.
> MAHOUT_LOCAL is set, running locally
> SLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in
>
> [jar:file:/Users/bandri/working/mahout/trunk/examples/target/mahout-examples-0.6-SNAPSHOT-job.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
>
> [jar:file:/Users/bandri/working/mahout/trunk/examples/target/dependency/slf4j-jcl-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
>
> [jar:file:/Users/bandri/working/mahout/trunk/examples/target/dependency/slf4j-log4j12-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an
> explanation.
> Exception in thread "main" java.lang.NullPointerException
>        at org.apache.hadoop.fs.Path.<init>(Path.java:61)
>        at org.apache.hadoop.fs.Path.<init>(Path.java:50)
>        at org.apache.mahout.utils.vectors.RowIdJob.run(RowIdJob.java:49)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
>        at org.apache.mahout.utils.vectors.RowIdJob.main(RowIdJob.java:89)
>        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:188)
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message