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From "Thomas Graves (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-399) Add an out of band heartbeat damper
Date Wed, 20 Feb 2013 21:55:12 GMT

     [ https://issues.apache.org/jira/browse/YARN-399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Graves updated YARN-399:
-------------------------------

    Attachment: YARN-399.PATCH

patch that I started. Hasn't been tested, attaching for now and will get back to later.
                
> Add an out of band heartbeat damper
> -----------------------------------
>
>                 Key: YARN-399
>                 URL: https://issues.apache.org/jira/browse/YARN-399
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 0.23.6
>            Reporter: Thomas Graves
>            Assignee: Thomas Graves
>         Attachments: YARN-399.PATCH
>
>
> We are seeing issues with the scheduler queue backing up on the RM. We have the nodemanager
heartbeats set at 5 seconds which should be more then long enough for the number of apps we
are running.  We believe this is due to the out of band heartbeats of the nodemanager coming
to soon when we have jobs with lots of containers that finish quickly.
> To help with that we could add an out of band heartbeat damper to the nodemanager similar
to what 1.X Tasktrackers have.  MAPREDUCE-2355 added it in 1.x.

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