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https://issues.apache.org/jira/browse/HADOOP-476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12462574
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Owen O'Malley commented on HADOOP-476:
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Sorry this patch has sat idle so long!
I tried this patch out and it messed up the usage. In particular, with no
options it should print the usage:
[EMAIL PROTECTED]> bin/hadoop jar build/hadoop-streaming.jar
07/01/05 11:19:58 ERROR streaming.StreamJob: Missing required option -input
Required argument: -input <name>
With -help it is a little better, but the old usage was far nicer to read:
[EMAIL PROTECTED]> bin/hadoop jar build/hadoop-streaming.jar -help
07/01/05 11:20:43 ERROR streaming.StreamJob: Unexpected -help while processing
-input|-output|-mapper|-combiner|-reducer|-file|-dfs|-jt|-inputreader|||-cacheFile|-cacheArchive|-verbose|-info|-debug|-inputtagged
Required argument: -input <name>
> Streaming should check for correctness of the task
> --------------------------------------------------
>
> Key: HADOOP-476
> URL: https://issues.apache.org/jira/browse/HADOOP-476
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/streaming
> Reporter: arkady borkovsky
> Assigned To: Sanjay Dahiya
> Attachments: Hadoop-476.patch, Hadoop-476.patch
>
>
> Currently, if anythin is wrong with streaming job, it dies without any
> explanation.
> Before creating and running actual MapReduce job, Streaming should check if:
> -- the executables (or scripts) for -mapper and -reducer are available and
> have right permissions
> -- the input fragments exist
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