[
https://issues.apache.org/jira/browse/YARN-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Lowe updated YARN-3487:
-----------------------------
Attachment: YARN-3487.001.patch
Patch that removes the synchronization around the ConcurrentHashMap access.
> CapacityScheduler.getQueueInfo grabs scheduler lock unnecessarily
> -----------------------------------------------------------------
>
> Key: YARN-3487
> URL: https://issues.apache.org/jira/browse/YARN-3487
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Affects Versions: 2.6.0
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
> Attachments: YARN-3487.001.patch
>
>
> Recently saw a significant slowdown of applications on a large cluster, and
> we noticed there were a large number of blocked threads on the RM. Most of
> the blocked threads were waiting for the CapacityScheduler lock while calling
> getQueueInfo.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
