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https://issues.apache.org/jira/browse/HBASE-22333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16829761#comment-16829761
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Sergey Shelukhin commented on HBASE-22333:
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cc [~bahramch]
> move certain internal RPCs to high priority level
> -------------------------------------------------
>
> Key: HBASE-22333
> URL: https://issues.apache.org/jira/browse/HBASE-22333
> Project: HBase
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Priority: Major
>
> User calls can inadvertently DDoS master (and potentially RS), causing issues
> (e.g. CallQueueTooBig) for important system calls like
> reportRegionStateTransition.
> These calls should be moved to high pri level... I wonder if all the
> low-volume internal calls (i.e. except heartbeats and maybe WAL splitting
> stuff) should have higher pri (e.g. 20 QoS in HConstants).
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