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From "Vinod Kumar Vavilapalli (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3618) TaskHeartbeatHandler holds a global lock for all task-updates
Date Wed, 11 Jan 2012 01:14:39 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod Kumar Vavilapalli updated MAPREDUCE-3618:
-----------------------------------------------

    Fix Version/s: 0.23.1
           Status: Open  (was: Patch Available)

Looks good overall. Can you set the concurrency level to match the number of threads from
TaskAttemptListener, perhaps by passing the number via constructor?

Also, please put a comment saying that the extra look up for the TaskAttempt in the map is
only when a task times out, so we should be fine.
                
> TaskHeartbeatHandler holds a global lock for all task-updates
> -------------------------------------------------------------
>
>                 Key: MAPREDUCE-3618
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3618
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2, performance
>    Affects Versions: 0.23.0
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>             Fix For: 0.23.1
>
>         Attachments: MR3618.txt
>
>


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