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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-893) Provide an ability to refresh queue configuration without restart.
Date Thu, 27 Aug 2009 05:20:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748263#action_12748263
] 

Hemanth Yamijala commented on MAPREDUCE-893:
--------------------------------------------

bq. What is 'it"? Commit to where?

The framework will not commit changes to queue properties it has validated until the scheduler
validates properties it owns. Commit to it's internal data structures which are the source
of truth for answering queries on ACLs, state, etc.

> Provide an ability to refresh queue configuration without restart.
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-893
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-893
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>            Reporter: Hemanth Yamijala
>
> While administering a cluster using multiple queues, administrators feel a need to refresh
queue properties on the fly without needing to restart the JobTracker. This is partially supported
for some properties such as queue ACLs (HADOOP-5396) and state (HADOOP-5913). The idea is
to extend the facility to refresh other queue properties as well, including scheduler properties.

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