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Date: Mon, 16 Mar 2009 23:58:50 -0700 (PDT)
From: "Amareshwari Sriramadasu (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-4842) Streaming combiner should allow
 command, not just JavaClass
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     [ https://issues.apache.org/jira/browse/HADOOP-4842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Amareshwari Sriramadasu updated HADOOP-4842:
--------------------------------------------

    Status: Open  (was: Patch Available)

Canceling patch since the test is failing on windows. Using shell-script in test fails on windows saying "CreateProcess error=193, %1 is not a valid Win32 application". 

> Streaming combiner should allow command, not just JavaClass
> -----------------------------------------------------------
>
>                 Key: HADOOP-4842
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4842
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Marco Nicosia
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.21.0
>
>         Attachments: patch-4842-1.txt, patch-4842-2.txt, patch-4842.txt
>
>
> Streaming jobs are way slower than Java jobs for many reasons, but certainly stopping the shell-only programmer from using the combiner feature won't help. Right now, the streaming usage says:
> {quote}
>   -mapper   <cmd|JavaClassName>      The streaming command to run
>   -combiner <JavaClassName> Combiner has to be a Java class
>   -reducer  <cmd|JavaClassName>      The streaming command to run
> {quote}

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