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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4629) In DEBUG_MODE, JobHistory#directoryTime() returns incorrect time
Date Thu, 06 Sep 2012 18:01:11 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449867#comment-13449867
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Karthik Kambatla commented on MAPREDUCE-4629:
---------------------------------------------

The DEBUG_MODE seems to be doing a lot of things. It has a shorter cleanup time for history
files, history filenames use different timestamps, prints stack traces at various points in
the code.

Given that the config option was not present in the mapred-default.xml so far, I wonder if
anyone is aware of and using DEBUG_MODE at all. One option is to remove the DEBUG_MODE and
do the following instead:
- Add a config-parameter for history cleanup
- Replace instances of debug-printing with LOG.debug()
- To address the ability to verify shorter cleanup times, add the hour/min to the history
filenames.
                
> In DEBUG_MODE, JobHistory#directoryTime() returns incorrect time
> ----------------------------------------------------------------
>
>                 Key: MAPREDUCE-4629
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4629
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1.0.3
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: MR-4629.patch, MR-4629.patch.v1
>
>
> The helper methods in JobHistory - directoryTime() and timestampDirectoryComponent()
- adjust the month field for readability (Jan is 0 as per Calendar, 1 for us)
> In DEBUG_MODE, JobHistory uses hour instead of month. However, the adjustment is still
applied.

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