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From "Nicolas Spiegelberg (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-2828) HTable unnecessarily coupled with HMaster
Date Tue, 13 Jul 2010 05:15:50 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2828?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Nicolas Spiegelberg updated HBASE-2828:

    Attachment: HBASE-2828.a.patch

Found the API I needed.   zk.exists() returns a Stat class, which contains the children count.

> 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
>             Fix For: 0.90.0
>         Attachments: 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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