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From "Alejandro Abdelnur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2835) Make per-job counter limits configurable
Date Tue, 06 Mar 2012 17:07:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13223426#comment-13223426
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Alejandro Abdelnur commented on MAPREDUCE-2835:
-----------------------------------------------

Initializing a static var with a 'loaded' configuration value at class loading time seems
too wrong. If we need to do something like this I would add an 'static init()' method to do
this initialization and call this method in the lifecycle of the corresponding services (JT/TT).

If the code that checks those limits is invoked on the client side when a client is querying
counters, this may break the client app if this limit is not set in the client mapred-site.xml.
This seems wrong as this is a server config property.

Also, would this check impact the job tasks? If so the counter initialization should be done
in the task bootstrap code.

+1 as this is enables custom limits but we should follow up with a proper fix (MAPREDUCE-3936)
                
> Make per-job counter limits configurable
> ----------------------------------------
>
>                 Key: MAPREDUCE-2835
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2835
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.20.204.0
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-2835.patch, MAPREDUCE-2835.patch
>
>
> The per-job counter limits introduced in MAPREDUCE-1943 are fixed, except for the total
number allowed per job (mapreduce.job.counters.limit). It would be useful to make them all
configurable.

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