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https://issues.apache.org/jira/browse/MAHOUT-419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Danny Leshem updated MAHOUT-419:
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Fix Version/s: 0.4
> Convert decomposer code to Hadoop 0.20 API
> ------------------------------------------
>
> Key: MAHOUT-419
> URL: https://issues.apache.org/jira/browse/MAHOUT-419
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Affects Versions: 0.3, 0.4
> Reporter: Danny Leshem
> Fix For: 0.4
>
>
> org.apache.mahout.math.hadoop classes (MatrixMultiplicationJob,
> TimesSquaredJob, TransposeJob) all use the deprecated Hadoop API. In the
> spirit of MAHOUT-167 and MAHOUT-143, I suggest converting them to Hadoop's
> 0.20 API.
> The reason I'm raising this now is that this code no longer runs on my Hadoop
> 0.22-SNAPSHOT cluster (not sure why really - it was running fine about a
> month ago, but after updating to the latest Mahout trunk a few days ago the
> code throws "java.lang.RuntimeException: Error in configuring object" at
> MapTask.runOldMapper).
> Also, the documentation at
> https://cwiki.apache.org/MAHOUT/dimensionalreduction.html is no longer
> accurate - the command line parameters have changed (even without the new
> arguments from MAHOUT-308). This is partly due to using the new argument
> parser which receives the input/output directories differently.
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