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From "Shannon Quinn (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAHOUT-1662) Potential Path bug in SequenceFileVaultIterator breaks DisplaySpectralKMeans
Date Mon, 30 Mar 2015 16:07:53 GMT
Shannon Quinn created MAHOUT-1662:
-------------------------------------

             Summary: Potential Path bug in SequenceFileVaultIterator breaks DisplaySpectralKMeans
                 Key: MAHOUT-1662
                 URL: https://issues.apache.org/jira/browse/MAHOUT-1662
             Project: Mahout
          Issue Type: Bug
          Components: Examples, mrlegacy
    Affects Versions: 0.9
            Reporter: Shannon Quinn
            Assignee: Shannon Quinn
             Fix For: 0.10.0


Received the following error when attempting to run DisplaySpectralKMeans:

Exception in thread "main" java.lang.IllegalArgumentException: Wrong FS: file://tmp/calculations/diagonal/part-r-00000/tmp/calculations/diagonal/part-r-00000,
expected: file:///
	at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:645)
	at org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:80)
	at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:529)
	at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:747)
	at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:524)
	at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:409)
	at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1750)
	at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1774)
	at org.apache.mahout.common.iterator.sequencefile.SequenceFileValueIterator.<init>(SequenceFileValueIterator.java:56)
	at org.apache.mahout.clustering.spectral.VectorCache.load(VectorCache.java:115)
	at org.apache.mahout.clustering.spectral.MatrixDiagonalizeJob.runJob(MatrixDiagonalizeJob.java:77)
	at org.apache.mahout.clustering.spectral.kmeans.SpectralKMeansDriver.run(SpectralKMeansDriver.java:170)
	at org.apache.mahout.clustering.spectral.kmeans.SpectralKMeansDriver.run(SpectralKMeansDriver.java:117)
	at org.apache.mahout.clustering.display.DisplaySpectralKMeans.main(DisplaySpectralKMeans.java:76)
	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:606)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

Tracked the origin of the bug to line 54 of SequenceFileVaultIterator. PR which contains a
fix is available; I would ask for independent verification before merging it with master.



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