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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11970) BlockCache would be instantiated when Master doesn't host regions
Date Mon, 15 Sep 2014 17:13:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134143#comment-14134143

Jimmy Xiang commented on HBASE-11970:

This is a little confusing. Sorry for that.

It is not "master is configured not to host any region". Instead, it is something like "master
is not configured to host regions if there are other regionservers". For example, in standalone/pseudo-distributed
mode, only one node is brought up by default, and the master has all regions.

> BlockCache would be instantiated when Master doesn't host regions
> -----------------------------------------------------------------
>                 Key: HBASE-11970
>                 URL: https://issues.apache.org/jira/browse/HBASE-11970
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.99.0
>            Reporter: Ted Yu
> HMaster ctor calls HRegionServer ctor which calls CacheConfig ctor where CacheConfig.instantiateBlockCache()
would create BlockCache.
> This happens even if Master is configured not to host regions.
> This was observed when I tried to answer question from the thread titled:
> 'The default hbase.regionserver.info.port doesn't work'

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