I have been seeing a similar error (running against trunk) when running cluster_reuters.sh (with CVB clustering). It complains that "Output directory: /reuters-lda already exists".
This was working fine a few weeks ago, not sure which of the intermediate code changes against CVB0Driver, or CVB0DocInferenceMapper could be causing this to happen now. ________________________________ From: Mark Wicks <mawi...@gmail.com> To: user@mahout.apache.org Sent: Monday, June 24, 2013 12:57 PM Subject: Re: Interpretating doc-topic output of cvb Thanks for the response. The command line I used is mahout cvb -ow -dict sparse/dictionary.file-0 -i matrix/matrix -o cvb/topics -dt cvb/classifications -block 2 -x 2 -cd 1e-10 -k2 -seed 6956 -tf 0.25 This completes with no errors in Mahout 0.7. With Mahout/cvb from trunk I get: 13/06/24 12:48:32 INFO cvb.CVB0Driver: About to run: Writing final topic/term distributions from temp/topicModelState/model-2 to cvb/topics 13/06/24 12:48:32 INFO input.FileInputFormat: Total input paths to process : 10 13/06/24 12:48:33 INFO cvb.CVB0Driver: About to run: Writing final document/topic inference from matrix/matrix to cvb/classifications 13/06/24 12:48:33 INFO mapred.JobClient: Cleaning up the staging area hdfs://192.168.84.8:9000/tmp/hadoop-hadoop/mapred/staging/mwicks/.staging/job_201304292057_0252 13/06/24 12:48:33 ERROR security.UserGroupInformation: PriviledgedActionException as:mwicks cause:org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory cvb/topics already exists Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory cvb/topics already exists at org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:137) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:949) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:912) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149) at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:912) at org.apache.hadoop.mapreduce.Job.submit(Job.java:500) at org.apache.mahout.clustering.lda.cvb.CVB0Driver.writeDocTopicInference(CVB0Driver.java:463) at org.apache.mahout.clustering.lda.cvb.CVB0Driver.run(CVB0Driver.java:339) at org.apache.mahout.clustering.lda.cvb.CVB0Driver.run(CVB0Driver.java:198) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.mahout.clustering.lda.cvb.CVB0Driver.main(CVB0Driver.java:534) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68) at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.RunJar.main(RunJar.java:156) I am certain that "cvb/topics" did not exist before running "mahout cvb". After the error, cvb/topics exists and contains data, but cvb/classifications does not exist. Mark