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https://issues.apache.org/jira/browse/MAPREDUCE-1249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784049#action_12784049
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Amareshwari Sriramadasu commented on MAPREDUCE-1249:
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It is documented that the parameters mapreduce.reduce.shuffle.connect.timeout
and mapreduce.reduce.shuffle.read.timeout are cluster-wide parameters. But,
actually they are job-level parameters. I think the tag "Expert" conveys the
fact that users are not supposed to play with it.
> mapreduce.reduce.shuffle.read.timeout's default value should be 3 minutes, in
> mapred-default.xml
> ------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1249
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1249
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: task
> Affects Versions: 0.21.0
> Reporter: Amareshwari Sriramadasu
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: patch-1249.txt
>
>
> mapreduce.reduce.shuffle.read.timeout has a value of 30,000 (30 seconds) in
> mapred-default.xml, whereas the default value in Fetcher code is 3 minutes.
> It should be 3 minutes by default, as it was in pre MAPREDUCE-353.
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