[MAHOUT-1662] Potential Path bug in SequenceFileVaultIterator breaks DisplaySpectralKMeans

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9
• Fix Version/s: 0.10.0
• Component/s: classic
• Assignee: Suneel Marthi
• Reporter: Shannon Quinn
• Created: 30/Mar/15 16:07
• Updated: 31/Jan/24 22:17
• Resolved: 04/Apr/15 04:57

Description

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.