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https://issues.apache.org/jira/browse/HBASE-5353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204204#comment-13204204
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Eli Collins commented on HBASE-5353:
------------------------------------

@Jesse, how is the HMaster machine a single point of failure? A SPOF is a part 
of the system that, if it fails, sstop the entire system from working. Because 
there's automatic HMaster failover that's not the case for HBase.
                
> HA/Distributed HMaster via RegionServers
> ----------------------------------------
>
>                 Key: HBASE-5353
>                 URL: https://issues.apache.org/jira/browse/HBASE-5353
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, regionserver
>    Affects Versions: 0.94.0
>            Reporter: Jesse Yates
>            Priority: Minor
>
> Currently, the HMaster node must be considered a 'special' node (single point 
> of failure), meaning that the node must be protected more than the other 
> commodity machines. It should be possible to instead have the HMaster be much 
> more available, either in a distributed sense (meaning a bit rewrite) or with 
> multiple instances and automatic failover. 

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