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https://issues.apache.org/jira/browse/HBASE-5353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204113#comment-13204113
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stack commented on HBASE-5353:
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bq. Except it opens a new can of worms: where do you find the master UI? how do
you monitor your master if it moves around? how do you easily find the master
logs when it could be anywhere in the cluster?
Its not a new can of worms, right? We have the above (mostly unsolved)
problems now if you run with more than one master.
bq. And any cron jobs or nagios alerts you write need to first call some HBase
utility to find the active master's IP via ZK in order to get to it?
They should be doing this now, if multiple masters?
If the master function were lightweight enough, it'd be kinda sweet having one
daemon type only I'd think; there'd be no longer need for special treatment of
master. Might be tricky having them running in the same JVM what w/ all the
executors afloat and RPCs (I'd rather do all in the one JVM then have RS
start/stop separate Master processes if we were going to go this route).
> 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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