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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1413) Improve logging of progress/errors in the job and task trackers
Date Fri, 11 Feb 2011 18:37:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12993626#comment-12993626
] 

Steve Loughran commented on MAPREDUCE-1413:
-------------------------------------------

@Chris

-my loggers are usually set up to log exceptions, some people's don't. I have a strategic
plan to write a better junit test reporter one day that would even log the stack in a structured
form, but that's so far down my todo list I wouldn't wait for it.

-The toString() operation gets logged in a couple of places (initalize, offerService), but
it's also handy for anyone stepping through code in IDEs: you can see what's going on. I think
own my code does print it out in a couple of places, though that's just a handy extra to let
me compare what I think I'm passing down to what the class thinks it's picked up. Logging
failures is more important.

> Improve logging of progress/errors in the job and task trackers
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-1413
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1413
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: tasktracker
>    Affects Versions: 0.22.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-1413.patch, MAPREDUCE-1413.patch
>
>
> I have code that improves the logging of the trackers as they start stop and fail, through
> # More logging of events
> # including exception strings and stacks when things go wrong
> People's whose JTs and TTs aren't behaving may appreciate this

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