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https://issues.apache.org/jira/browse/HBASE-3886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13448222#comment-13448222
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Lars Hofhansl commented on HBASE-3886:
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Maybe the issue was a restarted server with a different IP but same name? In
that case the master would still think the server has all these regions, when
in fact it doesn't?
> HServerInfo (and ServerName) equate the same if the hostname and port are
> same even if IP has changed
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-3886
> URL: https://issues.apache.org/jira/browse/HBASE-3886
> Project: HBase
> Issue Type: Improvement
> Reporter: stack
>
> This is an interesting one. HServerInfo is deprecated in TRUNK and replaced
> effectively by a new class ServerName. Both equate instances of HSI or SN if
> the two instances have the same hostname and port. Well, thats well and good
> but what if we are getting signals from a server whose IP has changed? In
> this case, we'll see the server in its new location come in but we'll treat
> it as though we'd seen it already, thought its IP had changed. We don't want
> this.
> This facility is needed for rare case where a server is moved from one IP to
> another.
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