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Date: Fri, 17 Oct 2008 09:48:44 -0700 (PDT)
From: "Hudson (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-3217) [HOD] Be less agressive when
 querying job status from resource manager.
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    [ https://issues.apache.org/jira/browse/HADOOP-3217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640569#action_12640569 ] 

Hudson commented on HADOOP-3217:
--------------------------------

Integrated in Hadoop-trunk #636 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/636/])
    . Decrease the rate at which the hod queries the resource manager for job status. Contributed by Hemanth Yamijala.


> [HOD] Be less agressive when querying job status from resource manager.
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-3217
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3217
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/hod
>    Affects Versions: 0.16.2
>            Reporter: Hemanth Yamijala
>            Assignee: Hemanth Yamijala
>            Priority: Blocker
>             Fix For: 0.17.3, 0.18.2, 0.19.0, 0.20.0
>
>         Attachments: HADOOP-3217, HADOOP-3217.patch.0.17, HADOOP-3217.patch.0.17, HADOOP-3217.patch.0.17
>
>
> After a job is submitted, HOD queries torque periodically until it finds the job to be running / completed (due to error). The initial rate of query is once every 0.5 seconds for 20 times, and then once every 10 seconds. This is probably a tad too aggressive as we find that Torque sometimes returns some odd errors under heavy load in the cluster (HADOOP-3216). It may be better to query at a more relaxed rate. 

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