[jira] Updated: (HADOOP-3852) If ShellCommandExecutor had a toString() operator that listed the command run, its error messages may be more meaningful

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

     [ https://issues.apache.org/jira/browse/HADOOP-3852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley updated HADOOP-3852:
----------------------------------

       Resolution: Fixed
    Fix Version/s: 0.19.0
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

I just committed this. Thanks, Steve!

> If ShellCommandExecutor had a toString() operator that listed the command run, its error messages may be more meaningful
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3852
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3852
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: util
>    Affects Versions: 0.19.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 0.19.0
>
>         Attachments: hadoop-3852.patch
>
>
> It may be easier to identify what causes error commands to be returned on an exec if the command is included in the error message. this can be done with 
> * a toString() operator on the class that includes the list of arguments (when non null)
> * a test that this works with arguments with spaces, and a null array
> * relevant use of the operator when an execute fails, such as in TaskTracker

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