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https://issues.apache.org/jira/browse/HBASE-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138800#comment-13138800
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Ted Yu commented on HBASE-4641:
-------------------------------
One benefit for patch v4 is that it allows different components to make
decisions based on whether JVM is for master or region server.
We can revisit this topic when more config parameters are set in this regard.
> Block cache can be mistakenly instantiated on Master
> ----------------------------------------------------
>
> Key: HBASE-4641
> URL: https://issues.apache.org/jira/browse/HBASE-4641
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.94.0
> Reporter: Jonathan Gray
> Assignee: Jonathan Gray
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: 4641-suggestion-v3.txt, 4641-v4.txt,
> HBASE-4641-v1.patch, HBASE-4641-v2.patch
>
>
> After changes in the block cache instantiation over in HBASE-4422, it looks
> like the HMaster can now end up with a block cache instantiated. Not a huge
> deal but prevents the process from shutting down properly.
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