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https://issues.apache.org/jira/browse/HDFS-3854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13446778#comment-13446778
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Uma Maheswara Rao G commented on HDFS-3854:
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Per the discussion in HDFS-3862, we may disable the fencing option with single
writer storage.
> 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: name-node
> Reporter: Uma Maheswara Rao G
>
> 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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