[jira] [Updated] (MAPREDUCE-3829) [Gridmix] Gridmix should give better error message when input-data directory already exists and -generate option is given

["Ravi Gummadi (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ravi Gummadi updated MAPREDUCE-3829:
------------------------------------

    Attachment: 3829.v0.patch

Attaching patch that fixes the issue.
With the patch, Gridmix (a) emits out an error message instead of throwing an Exception message on to the console and (b) exits instead of failing some where else later on.
The patch also emits out an error message in other cases like setupEmulation fails and returns proper exit code instead of returning 0 in failure cases. 
                
> [Gridmix] Gridmix should give better error message when input-data directory already exists and -generate option is given
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3829
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3829
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/gridmix
>            Reporter: Ravi Gummadi
>            Assignee: Ravi Gummadi
>         Attachments: 3829.v0.patch
>
>
> Instead of throwing exception messages on to the console, Gridmix should give better error message when input-data directory already exists and -generate option is given.

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