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Posted to mapreduce-issues@hadoop.apache.org by "Siddharth Seth (Created) (JIRA)" <ji...@apache.org> on 2012/01/13 23:38:39 UTC
[jira] [Created] (MAPREDUCE-3671) AM-NM RPC calls occasionally
takes a long time to respond
AM-NM RPC calls occasionally takes a long time to respond
---------------------------------------------------------
Key: MAPREDUCE-3671
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3671
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2, nodemanager
Affects Versions: 0.23.0
Reporter: Siddharth Seth
Observed while looking at MAPREDUCE-3596 and MAPREDUCE-3656.
startContainer taking over a minute in some cases, otherwise 15 seconds. Both were observed soon after reduce tasks started. Network congestion ? Need more looking into.
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[jira] [Updated] (MAPREDUCE-3671) AM-NM RPC calls occasionally
takes a long time to respond
Posted by "Vinod Kumar Vavilapalli (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-3671?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod Kumar Vavilapalli updated MAPREDUCE-3671:
-----------------------------------------------
Issue Type: Sub-task (was: Bug)
Parent: MAPREDUCE-3561
> AM-NM RPC calls occasionally takes a long time to respond
> ---------------------------------------------------------
>
> Key: MAPREDUCE-3671
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3671
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv2, nodemanager
> Affects Versions: 0.23.0
> Reporter: Siddharth Seth
>
> Observed while looking at MAPREDUCE-3596 and MAPREDUCE-3656.
> startContainer taking over a minute in some cases, otherwise 15 seconds. Both were observed soon after reduce tasks started. Network congestion ? Need more looking into.
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[jira] [Commented] (MAPREDUCE-3671) AM-NM RPC calls occasionally
takes a long time to respond
Posted by "Vinod Kumar Vavilapalli (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-3671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185993#comment-13185993 ]
Vinod Kumar Vavilapalli commented on MAPREDUCE-3671:
----------------------------------------------------
.. And this has performance implications on benchmarks. Hurts execution time real bad when there is no speculation for jobs with small tasks. Which is the default.
> AM-NM RPC calls occasionally takes a long time to respond
> ---------------------------------------------------------
>
> Key: MAPREDUCE-3671
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3671
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2, nodemanager
> Affects Versions: 0.23.0
> Reporter: Siddharth Seth
>
> Observed while looking at MAPREDUCE-3596 and MAPREDUCE-3656.
> startContainer taking over a minute in some cases, otherwise 15 seconds. Both were observed soon after reduce tasks started. Network congestion ? Need more looking into.
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