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https://issues.apache.org/jira/browse/HBASE-11740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jimmy Xiang updated HBASE-11740:
--------------------------------
Resolution: Fixed
Fix Version/s: 0.98.6
2.0.0
0.99.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Integrated into branch 0.98, 1, and master. Thanks Virag for the patch.
> RegionStates.getRegionAssignments() gets stuck on clone
> -------------------------------------------------------
>
> Key: HBASE-11740
> URL: https://issues.apache.org/jira/browse/HBASE-11740
> Project: HBase
> Issue Type: Sub-task
> Components: Region Assignment
> Reporter: Virag Kothari
> Assignee: Virag Kothari
> Fix For: 0.99.0, 2.0.0, 0.98.6
>
> Attachments: HBASE-11740.patch, HBASE-11740_2.patch
>
>
> This happens in processDeadServersAndRegionsInTransition() on Master startup.
> RegionAssigments is a tree map and TreeMap.clone() is expensive as it builds
> a tree from sorted data (Order of n). There were a million entries in
> RegionAssigments and from jstack, thread was stuck in
> TreeMap.buildFromSorted() for couple of hours.
> Instead of this shadow clone, wrapping as an unmodifiable Map should be
> enough.
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