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From "Kihwal Lee (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3851) Allow more aggressive action on detection of the jetty issue
Date Tue, 21 Feb 2012 20:52:49 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13212942#comment-13212942
] 

Kihwal Lee commented on MAPREDUCE-3851:
---------------------------------------

+1 The patch looks good to me. There is no explicit check and error message against {{size
<= 0}}, but I guess it's okay since TT won't go any further and the stack trace should
give a clue.
                
> Allow more aggressive action on detection of the jetty issue
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-3851
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3851
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 1.0.0
>            Reporter: Kihwal Lee
>            Assignee: Thomas Graves
>             Fix For: 1.1.0, 1.0.1
>
>         Attachments: MAPREDUCE-3851.patch, MAPREDUCE-3851.patch, MAPREDUCE-3851.patch
>
>
> MAPREDUCE-2529 added the useful failure detection mechanism. In this jira, I propose
we add a periodic check inside TT and configurable action to self-destruct. Blacklisting helps
but is not enough. Hung jetty still accepts connection and it takes very long time for clients
to fail out. Short jobs are delayed for hours because of this. This feature will be a nice
companion to MAPREDUCE-3184.

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