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https://issues.apache.org/jira/browse/HBASE-22150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16809430#comment-16809430
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Sergey Shelukhin commented on HBASE-22150:
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checkstyle is for inline if, I can fix on commit
+1 will commit tomorrow
> rssStub in HRegionServer is not thread safe and should not directly be used
> ---------------------------------------------------------------------------
>
> Key: HBASE-22150
> URL: https://issues.apache.org/jira/browse/HBASE-22150
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 3.0.0, 2.2.0
> Reporter: Bahram Chehrazy
> Assignee: Bahram Chehrazy
> Priority: Major
> Attachments:
> rssStub-is-not-thread-safe-hence-should-not-be-accessed-directly.patch
>
>
> While working on a patch for HBASE-22060, I noticed that a unit test started
> failing because region server crashed with NPE during initialization and
> after aborting the master. It turned out that access to the rssStub was not
> synchronized.
> The existing code in HRegionServer already takes care of this fact by copying
> and null checking in most places, but there are a couple ones that are not so
> careful. Those are in reportForDuty and abort methods.
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