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https://issues.apache.org/jira/browse/HBASE-2405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-2405:
-------------------------
Priority: Critical (was: Major)
Fix Version/s: (was: 0.20.4)
0.20.5
Moving to 0.20.5 but also marking it critical. Being single-threaded only
makes onlining/offlining of regions take longer than need be.
> Close, split, open of regions in RegionServer are run by a single thread only.
> ------------------------------------------------------------------------------
>
> Key: HBASE-2405
> URL: https://issues.apache.org/jira/browse/HBASE-2405
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: stack
> Priority: Critical
> Fix For: 0.20.5, 0.21.0
>
> Attachments: nsre.txt
>
>
> JGray and Karthik observed yesterday that a regoin open message arrived at
> the regionserver but that the regionserver worker thread did not get around
> to the actually opening until 45 seconds later (region offline for 45
> seconds). We only run a single Worker thread in a regoinserver processing
> open, close, and splits. In this case, a long running close (or two) held up
> the worker thread. We need to run more than a single worker. A pool of
> workers? Should opens be prioritized?
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