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https://issues.apache.org/jira/browse/HADOOP-4522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643363#action_12643363
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dhruba borthakur commented on HADOOP-4522:
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This command could be used by the FairShare scheduler too.
(src/contrib/fairshare)
In the curret code, the Fair Share scheduler periodically checks the
modification time of its configuration file to detect any changes.
> Capacity Scheduler needs to re-read its configuration
> -----------------------------------------------------
>
> Key: HADOOP-4522
> URL: https://issues.apache.org/jira/browse/HADOOP-4522
> Project: Hadoop Core
> Issue Type: New Feature
> Reporter: Vivek Ratan
>
> An external application (an Ops script, or some CLI-based tool) can change
> the configuration of the Capacity Scheduler (change the capacities of various
> queues, for example) by updating its config file. This application then needs
> to tell the Capacity Scheduler that its config has changed, which causes the
> Scheduler to re-read its configuration. It's possible that the Capacity
> Scheduler may need to interact with external applications in other similar
> ways.
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