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From "Suneel Marthi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-944) LuceneIndexToSequenceFiles (lucene2seq) utility
Date Mon, 24 Jun 2013 02:17:20 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13691667#comment-13691667
] 

Suneel Marthi commented on MAHOUT-944:
--------------------------------------

This error was seen consistently today in successive Jenkins builds.

{Code}
INFO:  Using ResourceCalculatorPlugin : org.apache.hadoop.util.LinuxResourceCalculatorPlugin@dac21
Jun 23, 2013 11:10:04 PM org.apache.hadoop.mapred.LocalJobRunner$Job run
WARNING: job_local_0001
java.lang.ClassCastException: org.apache.mahout.text.LuceneSegmentInputSplit cannot be cast
to org.apache.hadoop.mapred.InputSplit
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:412)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
	at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:214)
{Code}

Not sure as to where this is coming from, the code is all new M/R APIs AFAIK. How/Who invokes
OldMapper in a MapReduce job? 
                
> LuceneIndexToSequenceFiles (lucene2seq) utility
> -----------------------------------------------
>
>                 Key: MAHOUT-944
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-944
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Integration
>    Affects Versions: 0.5
>            Reporter: Frank Scholten
>            Assignee: Grant Ingersoll
>            Priority: Minor
>             Fix For: 0.8
>
>         Attachments: MAHOUT-944-minor.patch, MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch,
MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch,
MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch
>
>
> Here is a lucene2seq tool I used in a project. It creates sequence files based on the
stored fields of a lucene index.
> The output from this tool can be then fed into seq2sparse and from there you can do text
clustering.
> Comes with Java bean configuration.
> Let me know what you think. Some CLI code can be added later on. I used this for a small-scale
project +- 100.000 docs. Is a MR version useful or is that overkill?
> See https://github.com/frankscholten/mahout/tree/lucene2seq for commits and review comments
from Simon Willnauer (Thanks Simon!)
> or the attached patch.

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