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Posted to issues@tez.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2014/09/17 02:17:35 UTC

[jira] [Updated] (TEZ-1589) ContainerReporter requests AM for getTask() too frequently (causing pressure on AM side)

     [ https://issues.apache.org/jira/browse/TEZ-1589?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajesh Balamohan updated TEZ-1589:
----------------------------------
    Summary: ContainerReporter requests AM for getTask() too frequently (causing pressure on AM side)  (was: ContainerReporter requests AM for getTask too frequently (causing pressure on AM side))

> ContainerReporter requests AM for getTask() too frequently (causing pressure on AM side)
> ----------------------------------------------------------------------------------------
>
>                 Key: TEZ-1589
>                 URL: https://issues.apache.org/jira/browse/TEZ-1589
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>              Labels: performance
>         Attachments: TEZ-1589.1.patch
>
>
> Min time to wait before a task requests AM for another task is set to 200 ms.  As per ContainerReporter->call() logic, it would be invoked every 10ms until we reach 200ms.
> This wouldn't be much of a problem for small jobs.  But for large jobs with many tasks, this will cause pressure on AM.



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