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