[jira] [Resolved] (OOZIE-144) GH-118: JT/NN backoff if response time over threshold

["Hadoop QA (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OOZIE-144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hadoop QA resolved OOZIE-144.
-----------------------------

    Resolution: Fixed

> GH-118: JT/NN backoff if response time over threshold
> -----------------------------------------------------
>
>                 Key: OOZIE-144
>                 URL: https://issues.apache.org/jira/browse/OOZIE-144
>             Project: Oozie
>          Issue Type: Bug
>            Reporter: Hadoop QA
>
> If the JT/NN and overloaded Oozie should back-off temporary.
> This can be done in the HadoopAccessorService.
> Because JT/NN does not provide and API to find out the current health this has to be determined using API calls that do a known/fixed amount of work. For example for JT asking for the queue names, for NN asking for the contents of the root directory.
> A tool that queries this values should be run against the cluster to find the normal values an values under stress. This would help to determine the threshold value for Oozie.
> Oozie, before using a  JT/NN handle (JobClient/FileSystem) will test the  response time, if the response time is above the threshold Oozie will backoff for # seconds and will not attempt any call to the cluster.

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