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https://issues.apache.org/jira/browse/HBASE-11290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130263#comment-14130263
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Andrey Stepachev commented on HBASE-11290:
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[~virag] compilation fails. applied patch to branch1 (it applies cleanly) but
got compilation error
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile)
on project hbase-server: Compilation failure
[ERROR]
HBASE-11290/hbase.git/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java:[771,20]
error: cannot find symbol
It didn't find RegionStates#setLastRegionServerOfRegion method
> Unlock RegionStates
> -------------------
>
> Key: HBASE-11290
> URL: https://issues.apache.org/jira/browse/HBASE-11290
> Project: HBase
> Issue Type: Sub-task
> Reporter: Francis Liu
> Assignee: Virag Kothari
> Attachments: HBASE-11290-0.98.patch, HBASE-11290.draft.patch
>
>
> Even though RegionStates is a highly accessed data structure in HMaster. Most
> of it's methods are synchronized. Which limits concurrency. Even simply
> making some of the getters non-synchronized by using concurrent data
> structures has helped with region assignments. We can go as simple as this
> approach or create locks per region or a bucket lock per region bucket.
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