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From "Fengdong Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4631) Support customized call back method during failover automatically.
Date Fri, 29 Mar 2013 03:49:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617042#comment-13617042

Fengdong Yu commented on HDFS-4631:

Yes Todd.
I just want to be informed when start to do failover.

I will try hdfs haadmin -checkhealt in a loop

> Support customized call back method during failover automatically.
> ------------------------------------------------------------------
>                 Key: HDFS-4631
>                 URL: https://issues.apache.org/jira/browse/HDFS-4631
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: ha
>    Affects Versions: 3.0.0
>            Reporter: Fengdong Yu
>              Labels: features, ha, hadoop
>             Fix For: 3.0.0
>         Attachments: HDFS-4631.patch
>   Original Estimate: 0.5m
>  Remaining Estimate: 0.5m
> ZKFC add HealthCallbacks by default, this can do quiteElection at least. but we often
want to be alerted if there is fail over occurring(such as send email, short messages), especially
for prod cluster.
> There is a configured fence script. maybe we can put all these logics in the script.
but in reasonable, fence script does only one thing: fence :)
> So I added this patch, we can configure customized HM callback method, if there is no
configuration, then only HealthCallbacks is added.

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