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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-476) Streaming should check for correctness of the task
Date Fri, 05 Jan 2007 19:22:27 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12462574

Owen O'Malley commented on HADOOP-476:

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:

oom@cdev6009> 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:

oom@cdev6009> 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
> -- the input fragments exist

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