[jira] Commented: (HADOOP-3385) hadoop streaming to support shell pipes: "tr ' ' '\t' | cut -f 3,4"

["Owen O'Malley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-3385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12596631#action_12596631 ] 

Owen O'Malley commented on HADOOP-3385:
---------------------------------------

The problem is that streaming doesn't invoke bash. You can already do it as:

bash -c "tr ' ' '\t' | cut -f 3,4"



> hadoop streaming to support shell pipes: "tr ' ' '\t' | cut -f 3,4"
> -------------------------------------------------------------------
>
>                 Key: HADOOP-3385
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3385
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Zheng Shao
>
> Hadoop streaming does not support shell pipes, but a lot of times shell pipes are very useful for processing streams of data.
> I don't see any reason that hadoop streaming cannot support it.

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