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https://issues.apache.org/jira/browse/HBASE-10626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13914826#comment-13914826
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Nick Dimiduk commented on HBASE-10626:
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Please see the [prerequisites
section|http://hbase.apache.org/book.html#basic.prerequisites] of the online
book. Hadoop and HBase are picky about the network in which they operate. The
[hadoop-dns-checker|https://github.com/sujee/hadoop-dns-checker] can help you
identify issues.
> Two servernames of same ip in Master
> ------------------------------------
>
> Key: HBASE-10626
> URL: https://issues.apache.org/jira/browse/HBASE-10626
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.96.1.1
> Environment: hadoop-2.2.0
> Reporter: xinrong
> Priority: Trivial
>
> since the hadoop-2.2.0 need a reverse look up about hostname and our dns
> doesn't support the reverse look up, we configured the "/etc/hosts" of
> namenode, This lead a bug when we started hbase master in the same machine of
> namenode:
> the "HMaster" would get a "ServerName" which consisted of hostname,port,ts
> and get another "ServerName" from zookeeper consisted of ip,port,ts, One
> regionserver will be recorded twice.
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