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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3851) Allow more aggressive action on detection of the jetty issue
Date Thu, 16 Feb 2012 22:17:01 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13209803#comment-13209803
] 

Todd Lipcon commented on MAPREDUCE-3851:
----------------------------------------

Looks like the exception count is across the lifetime of the TT. It should instead be something
like a trailing time window, or better, a trailing ratio of successes vs exceptions. Otherwise
there's no reasonable way to set a value for the limit. right?
                
> 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-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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