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https://issues.apache.org/jira/browse/HBASE-10367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16202231#comment-16202231
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stack commented on HBASE-10367:
-------------------------------
Patch is looking nice [~jerryhe]
You rename Admin methods w/o deprecation, what you thinking? Has the API not
shipped in a release?
Do you not pass the names of the servers being decommissioned to the
coprocessor for a reason? I'd think the CP would be interested in which server
is being changed.
Otherwise, looking good.
> RegionServer graceful stop / decommissioning
> --------------------------------------------
>
> Key: HBASE-10367
> URL: https://issues.apache.org/jira/browse/HBASE-10367
> Project: HBase
> Issue Type: Improvement
> Reporter: Enis Soztutar
> Assignee: Jerry He
> Fix For: 3.0.0, 2.0.0-alpha-4
>
> Attachments: HBASE-10367-master.patch
>
>
> Right now, we have a weird way of node decommissioning / graceful stop, which
> is a graceful_stop.sh bash script, and a region_mover ruby script, and some
> draining server support which you have to manually write to a znode
> (really!). Also draining servers is only partially supported in LB operations
> (LB does take that into account for roundRobin assignment, but not for normal
> balance)
> See
> http://hbase.apache.org/book/node.management.html and HBASE-3071
> I think we should support graceful stop as a first class citizen. Thinking
> about it, it seems that the difference between regionserver stop and graceful
> stop is that regionserver stop will close the regions, but the master will
> only assign them after the znode is deleted.
> In the new master design (or even before), if we allow RS to be able to close
> regions on its own (without master initiating it), then graceful stop becomes
> regular stop. The RS already closes the regions cleanly, and will reject new
> region assignments, so that we don't need much of the balancer or draining
> server trickery.
> This ties into the new master/AM redesign (HBASE-5487), but still deserves
> it's own jira. Let's use this to brainstorm on the design.
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