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Date: Thu, 3 May 2012 02:01:48 +0000 (UTC)
From: "Todd Lipcon (JIRA)" <jira@apache.org>
To: common-dev@hadoop.apache.org
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Subject: [jira] [Resolved] (HADOOP-8279) Auto-HA: Allow manual failover to
 be invoked from zkfc.
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     [ https://issues.apache.org/jira/browse/HADOOP-8279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon resolved HADOOP-8279.
---------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed

Committed to branch, thanks Aaron.
                
> Auto-HA: Allow manual failover to be invoked from zkfc.
> -------------------------------------------------------
>
>                 Key: HADOOP-8279
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8279
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: auto-failover, ha
>    Affects Versions: Auto Failover (HDFS-3042)
>            Reporter: Mingjie Lai
>            Assignee: Todd Lipcon
>             Fix For: Auto Failover (HDFS-3042)
>
>         Attachments: hadoop-8279.txt, hadoop-8279.txt, hadoop-8279.txt, hadoop-8279.txt, hadoop-8279.txt
>
>
> HADOOP-8247 introduces a configure flag to prevent potential status inconsistency between zkfc and namenode, by making auto and manual failover mutually exclusive.
> However, as described in 2.7.2 section of design doc at HDFS-2185, we should allow manual and auto failover co-exist, by:
> - adding some rpc interfaces at zkfc
> - manual failover shall be triggered by haadmin, and handled by zkfc if auto failover is enabled. 

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