[jira] [Commented] (HDFS-3854) Implement a fence method which should fence the BK shared storage.

["Uma Maheswara Rao G (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-3854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14585499#comment-14585499 ] 

Uma Maheswara Rao G commented on HDFS-3854:
-------------------------------------------

Go ahead closing it as duplicate.

> Implement a fence method which should fence the BK shared storage.
> ------------------------------------------------------------------
>
>                 Key: HDFS-3854
>                 URL: https://issues.apache.org/jira/browse/HDFS-3854
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Uma Maheswara Rao G
>            Assignee: Rakesh R
>
> Currently when machine down or network down, SSHFence can not ensure that, other node is completely down. So, fence will fail and switch will not happen.
> [ internally we did work around to return true when machine is not reachable, as BKJM already has fencing]
> It may be good idea to implement a fence method, which should ensure shared storage fenced propertly and return true.
> We can plug in this new method in ZKFC fence methods.
> only pain points what I can see is, we may have to put the BKJM jar in ZKFC lib for running this fence method.
> thoughts?



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