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https://issues.apache.org/jira/browse/HBASE-1679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806543#action_12806543
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Kannan Muthukkaruppan commented on HBASE-1679:
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Yup, this is pretty much the issue we ran into.
And when the regionserver was asked to restarted, it registered itself again
under /hbase/rs in zookeeper using a new startcode as the element (znode) name.
> Flapping DNS does us more harm than it need to
> ----------------------------------------------
>
> Key: HBASE-1679
> URL: https://issues.apache.org/jira/browse/HBASE-1679
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Fix For: 0.21.0
>
>
> Over in HBASE-1675, JSharp has posted logs where a temporary DNS outage does
> his cluster a death blow.
> When cluster members report in, the master composes the regionserver name by
> doing a hostname lookup and appending it to port and startcode passed over by
> the regionserver. The host lookup during a DNS outage when from name to IP.
> Master then thought this regionserver an unknown host and told it restart....
> and so on.
> If the regionserver composed its name once, it could pass this the master and
> avoid a DNS lookup per regionserver report.
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