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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3875) Fix TaskTracker's heartbeat timer to note the time the hearbeat RPC returned to decide next heartbeat time
Date Fri, 08 Aug 2008 23:36:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley updated HADOOP-3875:
----------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I just committed this. Thanks, Arun!

> Fix TaskTracker's heartbeat timer to note the time the hearbeat RPC returned to decide
next heartbeat time
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3875
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3875
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.18.0
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>             Fix For: 0.19.0
>
>         Attachments: HADOOP-3875_0_20080730.patch
>
>
> The tasktracker notes the time the heartbeat RPC was fired, rather than when it returned
to decide when to send the next one. If the RPC spends a lot of time in the JobTracker's queue
then the above exacerbates the load on the JobTracker.

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