[
https://issues.apache.org/jira/browse/HADOOP-4683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655908#action_12655908
]
Jothi Padmanabhan commented on HADOOP-4683:
-------------------------------------------
ant test and test-contrib passed on my local box
> Move the call to getMapCompletionEvents in
> ReduceTask.ReduceCopier.fetchOutputs to a separate thread
> ----------------------------------------------------------------------------------------------------
>
> Key: HADOOP-4683
> URL: https://issues.apache.org/jira/browse/HADOOP-4683
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Devaraj Das
> Assignee: Jothi Padmanabhan
> Fix For: 0.20.0
>
> Attachments: hadoop-4683.patch
>
>
> The method ReduceTask.ReduceCopier.fetchOutputs makes a call to
> getMapCompletionEvents every iteration of the loop. This should be moved out
> to a separate thread. This might slow down the shuffle scheduler in some
> cases since there is a sleep inside the getMapCompletionEvents method.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
