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From "Zhihong Yu (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5209) HConnection/HMasterInterface should allow for way to get hostname of currently active master in multi-master HBase setup
Date Fri, 10 Feb 2012 17:45:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205575#comment-13205575
] 

Zhihong Yu commented on HBASE-5209:
-----------------------------------

For ServerName to provide info port, we can open a separate JIRA.

@David:
Can you explain the rationale behind the new parameters ?
{code}
+      final boolean isMasterRunning,
+      final boolean isActiveMaster,
{code}
Looking at the current fields related to servers in ClusterStatus, they are all of Collection.

I would expect a ServerName to represent the active master.

Once design passes review, please use review board for further discussion.
                
> HConnection/HMasterInterface should allow for way to get hostname of currently active
master in multi-master HBase setup
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-5209
>                 URL: https://issues.apache.org/jira/browse/HBASE-5209
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 0.94.0, 0.90.5, 0.92.0
>            Reporter: Aditya Acharya
>            Assignee: David S. Wang
>             Fix For: 0.94.0, 0.90.7, 0.92.1
>
>         Attachments: HBASE-5209-v0.diff, HBASE-5209-v1.diff
>
>
> I have a multi-master HBase set up, and I'm trying to programmatically determine which
of the masters is currently active. But the API does not allow me to do this. There is a getMaster()
method in the HConnection class, but it returns an HMasterInterface, whose methods do not
allow me to find out which master won the last race. The API should have a getActiveMasterHostname()
or something to that effect.

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