[jira] [Issue Comment Edited] (MAHOUT-814) SSVD local tests should use their own tmp space to avoid collisions

["Dmitriy Lyubimov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13108319#comment-13108319 ] 

Dmitriy Lyubimov edited comment on MAHOUT-814 at 9/20/11 1:51 AM:
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One hack that can probably overcome this. i am still not convinced that's the best way to do it, but at least the task wouldn't be writing directly into java.io.tmpdir when specifically requested not to.

Github snapshot is here: https://github.com/dlyubimov/mahout-commits/tree/MAHOUT-814


      was (Author: dlyubimov):
    One hack that can probably overcome this. i am still not convinced that's the best way to do it, but at least the task wouldn't be writing directly into java.io.tmpdir when specifically requested not to.


  
> SSVD local tests should use their own tmp space to avoid collisions
> -------------------------------------------------------------------
>
>                 Key: MAHOUT-814
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-814
>             Project: Mahout
>          Issue Type: Bug
>    Affects Versions: 0.5
>            Reporter: Grant Ingersoll
>            Assignee: Dmitriy Lyubimov
>            Priority: Minor
>             Fix For: 0.6
>
>         Attachments: MAHOUT-814.patch
>
>
> Running Mahout in an environment with Jenkins also running and am getting:
> {quote}
> java.io.FileNotFoundException: /tmp/q-temp.seq (Permission denied)
>         at java.io.FileOutputStream.open(Native Method)
>         at java.io.FileOutputStream.<init>(FileOutputStream.java:209)
>         at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.<init>(RawLocalFileSystem.java:187)
>         at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.<init>(RawLocalFileSystem.java:183)
>         at org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:241)
>         at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSOutputSummer.<init>(ChecksumFileSystem.java:335)
>         at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:368)
>         at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:528)
>         at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.<init>(SequenceFile.java:1198)
>         at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:401)
>         at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:284)
>         at org.apache.mahout.math.hadoop.stochasticsvd.qr.QRFirstStep.getTempQw(QRFirstStep.java:263)
>         at org.apache.mahout.math.hadoop.stochasticsvd.qr.QRFirstStep.flushSolver(QRFirstStep.java:104)
>         at org.apache.mahout.math.hadoop.stochasticsvd.qr.QRFirstStep.map(QRFirstStep.java:175)
>         at org.apache.mahout.math.hadoop.stochasticsvd.qr.QRFirstStep.collect(QRFirstStep.java:279)
>         at org.apache.mahout.math.hadoop.stochasticsvd.QJob$QMapper.map(QJob.java:142)
>         at org.apache.mahout.math.hadoop.stochasticsvd.QJob$QMapper.map(QJob.java:71)
>         at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
>         at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
>         at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
> {quote}
> Also seeing the following tests fail:
> {quote}
> Tests in error: 
>   testSSVDSolverSparse(org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverSparseSequentialTest): Q job unsuccessful.
>   testSSVDSolverPowerIterations1(org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverSparseSequentialTest): Q job unsuccessful.
>   testSSVDSolverPowerIterations1(org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverDenseTest): Q job unsuccessful.
>   testSSVDSolverDense(org.apache.mahout.math.hadoop.stochasticsvd.LocalSSVDSolverDenseTest): Q job unsuccessful.
> {quote}
> I haven't checked all of them, but I suspect they are all due to the same reason.  We should dynamically create a temp area for each test using temporary directories under the main temp dir.

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