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Posted to common-issues@hadoop.apache.org by "Todd Lipcon (Commented) (JIRA)" <ji...@apache.org> on 2012/04/14 01:57:16 UTC

[jira] [Commented] (HADOOP-8279) Auto-HA: Allow manual failover to be invoked from zkfc.

    [ https://issues.apache.org/jira/browse/HADOOP-8279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13253887#comment-13253887 ] 

Todd Lipcon commented on HADOOP-8279:
-------------------------------------

Thanks for filing this, Mingjie. I plan to work on it in the coming weeks.
                
> 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: ha
>    Affects Versions: Auto Failover (HDFS-3042)
>            Reporter: Mingjie Lai
>            Assignee: Todd Lipcon
>             Fix For: Auto Failover (HDFS-3042)
>
>
> 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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