[jira] Commented: (HBASE-2828) HTable unnecessarily coupled with HMaster

["Nicolas Spiegelberg (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-2828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928012#action_12928012 ] 

Nicolas Spiegelberg commented on HBASE-2828:
--------------------------------------------

can we add some explicit comment in there about purposefully not going to Master for the RS count.  I wouldn't want a 3rd occurrence of this...

> HTable unnecessarily coupled with HMaster
> -----------------------------------------
>
>                 Key: HBASE-2828
>                 URL: https://issues.apache.org/jira/browse/HBASE-2828
>             Project: HBase
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.90.0
>            Reporter: Nicolas Spiegelberg
>            Assignee: Nicolas Spiegelberg
>             Fix For: 0.90.0
>
>         Attachments: HBASE-2828-0.90.patch, HBASE-2828.a.patch, HBASE-2828.patch
>
>
> HTable constructor calls "getCurrentNrHRS()" to get the region server count for thread pool creation.  This code calls HBaseAdmin.getClusterStatus() [aka: the HMaster] to get the server count.  This information can be scraped from counting the ZooKeeper /hbase/rs/--- ZNodes.  Need to remove unnecessary master queries when ZooKeeper can do the same job.

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