Space: Apache Mahout (https://cwiki.apache.org/confluence/display/MAHOUT) Page: Quick tour of text analysis using the Mahout command line (https://cwiki.apache.org/confluence/display/MAHOUT/Quick+tour+of+text+analysis+using+the+Mahout+command+line) Comment: https://cwiki.apache.org/confluence/display/MAHOUT/Quick+tour+of+text+analysis+using+the+Mahout+command+line?focusedCommentId=27849121#comment-27849121
Comment added by Pat Ferrel: --------------------------------------------------------------------- The best place for questions is on the mailing list [email protected] If you are using mahout you probably want to join. In reply to a comment by yexq: [hadoop@RH01 classes]$ hadoop fs -ls reuters-vectors/tfidf-vectors/part-r-00000 Found 1 items -rw-r--r-- 2 hadoop supergroup 15551368 2012-04-10 16:47 /user/hadoop/reuters-vectors/tfidf-vectors/part-r-00000 [hadoop@RH01 classes]$ mahout rowid -i reuters-vectors/tfidf-vectors/part-r-00000 -o reuters-matrix Running on hadoop, using HADOOP_HOME=/mnt/userspace/hadoop-0.20.2 HADOOP_CONF_DIR=/mnt/userspace/hadoop-0.20.2/conf Exception in thread "main" java.lang.IllegalArgumentException: Can not create a Path from a null string at org.apache.hadoop.fs.Path.checkPathArg(Path.java:78) at org.apache.hadoop.fs.Path.<init>(Path.java:90) at org.apache.mahout.utils.vectors.RowIdJob.run(RowIdJob.java:42) 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:76) 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$ProgramDescription.invoke(ProgramDriver.java:68) at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:187) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.RunJar.main(RunJar.java:156) [hadoop@RH01 classes]$ who can help me？？？？ Change your notification preferences: https://cwiki.apache.org/confluence/users/viewnotifications.action
