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Posted to mapreduce-issues@hadoop.apache.org by "Jonathan Turner Eagles (Jira)" <ji...@apache.org> on 2021/07/07 15:23:00 UTC
[jira] [Resolved] (MAPREDUCE-6066) Speculative attempts should not
run on the same node as their original attempt
[ https://issues.apache.org/jira/browse/MAPREDUCE-6066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Turner Eagles resolved MAPREDUCE-6066.
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Resolution: Duplicate
> Speculative attempts should not run on the same node as their original attempt
> ------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6066
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6066
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: applicationmaster, scheduler
> Affects Versions: 2.5.0, 2.6.0
> Reporter: Todd Lipcon
> Priority: Major
> Attachments: conf.xml
>
>
> I'm seeing a behavior on trunk with fair scheduler enabled where a speculative reduce attempt is getting run on the same node as its original attempt. This doesn't make sense -- the main reason for speculative execution is to deal with a slow node, so scheduling a second attempt on the same node would just make the problem worse if anything.
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