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https://issues.apache.org/jira/browse/HBASE-10367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jerry He updated HBASE-10367:
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Attachment: HBASE-10367-master-2.patch
v2. updated the coprocessor hooks. Also added a boolean to the decommission
API to tell if to offload the regions from the decommissioned server or not.
There is use case where we just want to 'isolate' the server, not offload the
regions.
> 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: 2.0.0-beta-1
>
> Attachments: HBASE-10367-master-2.patch, HBASE-10367-master.patch,
> 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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