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https://issues.apache.org/jira/browse/HADOOP-5881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713425#action_12713425
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Hemanth Yamijala commented on HADOOP-5881:
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I had a chat with Owen regarding the objections raised.
bq. I'm concerned that this went in without an opportunity for review. The
patch was uploaded at 5:49am and committed at 6:36am.
I apologize for the rushed commit and take responsibility. However, as I
explained above I had reviewed the patch for a significant time. The first
version which I reviewed is not on JIRA. In retrospect, I think that was a
mistake, and will avoid repeating it in future. Sorry !
bq. I'm also concerned that this incompatibly changes the config variables in
the 0.20 branch. What is the rationale for pushing these configuration changes
back to 0.20? If they are required, they need a compatability story.
There was a misunderstanding on this point. It seemed like in an internal
discussion we agreed to this approach. However, we are reverting stand after
rethinking. I opened HADOOP-5919 to discuss and provide a backwards
compatibility story for this feature. Let's keep the discussion there.
Based on these explanations, can I resolve this bug ?
> Simplify configuration related to task-memory-monitoring and memory-based
> scheduling
> ------------------------------------------------------------------------------------
>
> Key: HADOOP-5881
> URL: https://issues.apache.org/jira/browse/HADOOP-5881
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Vinod K V
> Assignee: Vinod K V
> Fix For: 0.20.1
>
> Attachments: HADOOP-5881-20090526-branch-20.1.txt,
> HADOOP-5881-20090526.1.txt
>
>
> The configuration we have now is pretty complicated. Besides everything else,
> the mechanism of not specifying parameters separately for maps and reduces
> leads to problems like HADOOP-5811. This JIRA should address simplifying
> things and at the same time solving these problems.
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