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https://issues.apache.org/jira/browse/MAHOUT-1408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitriy Lyubimov resolved MAHOUT-1408.
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Resolution: Won't Fix
Don't see a reason to do anything.
> Distributed cache file matching bug while running SSVD in broadcast mode
> ------------------------------------------------------------------------
>
> Key: MAHOUT-1408
> URL: https://issues.apache.org/jira/browse/MAHOUT-1408
> Project: Mahout
> Issue Type: Bug
> Components: Math
> Affects Versions: 0.8
> Reporter: Angad Singh
> Assignee: Dmitriy Lyubimov
> Priority: Minor
> Attachments: BtJob.java.patch
>
>
> The error is:
> java.lang.IllegalArgumentException: Unexpected file name, unable to deduce
> partition
> #:file:/data/d1/mapred/local/taskTracker/distcache/434503979705629827_-1822139941_1047712745/nn.red.ua2.inmobi.com/user/rmcuser/oozie-oozi/0034272-140120102756143-oozie-oozi-W/inmobi-ssvd_mahout--java/java-launcher.jar
> at
> org.apache.mahout.math.hadoop.stochasticsvd.SSVDHelper$1.compare(SSVDHelper.java:154)
> at
> org.apache.mahout.math.hadoop.stochasticsvd.SSVDHelper$1.compare(SSVDHelper.java:1)
> at java.util.Arrays.mergeSort(Arrays.java:1270)
> at java.util.Arrays.mergeSort(Arrays.java:1281)
> at java.util.Arrays.mergeSort(Arrays.java:1281)
> at java.util.Arrays.sort(Arrays.java:1210)
> at
> org.apache.mahout.common.iterator.sequencefile.SequenceFileDirValueIterator.init(SequenceFileDirValueIterator.java:112)
> at
> org.apache.mahout.common.iterator.sequencefile.SequenceFileDirValueIterator.<init>(SequenceFileDirValueIterator.java:94)
> at
> org.apache.mahout.math.hadoop.stochasticsvd.BtJob$BtMapper.setup(BtJob.java:220)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:647)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:323)
> at org.apache.hadoop.mapred.Child$4.run(Child.java:266)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
> at org.apache.hadoop.mapred.Child.main(Child.java:260)
> The bug is @
> https://github.com/apache/mahout/blob/trunk/core/src/main/java/org/apache/mahout/math/hadoop/stochasticsvd/BtJob.java,
> near line 220.
> and @
> https://github.com/apache/mahout/blob/trunk/core/src/main/java/org/apache/mahout/math/hadoop/stochasticsvd/SSVDHelper.java
> near line 144.
> SSVDHelper's PARTITION_COMPARATOR assumes all files in the distributed cache
> will have a particular pattern whereas we have jar files in our distributed
> cache which causes the above exception.
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