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https://issues.apache.org/jira/browse/HBASE-2697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12881672#action_12881672
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Jonathan Gray commented on HBASE-2697:
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Some first steps on this one:
1. M->RS communication for open/close into direct RPC calls
2. RS->ZK use a new data structure to put into unassigned nodes rather than HMsg
3. M: Move open/close region logic into handlers
4. Move META editing into RS handlers
> Implement new open/close logic in handlers and stop using heartbeats for
> open/close messages
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-2697
> URL: https://issues.apache.org/jira/browse/HBASE-2697
> Project: HBase
> Issue Type: Sub-task
> Components: ipc, master, regionserver
> Reporter: Jonathan Gray
> Priority: Critical
> Fix For: 0.21.0
>
>
> This issue is doing the meat of what HBASE-2485 is about and continues what
> was started in HBASE-2694 after some code cleanup to make life easier.
> This deals with no longer piggybacking messages from Master to RegionServers
> on heartbeat responses and instead sending direct unsolicited messages. This
> also deals with moving the open/close logic fully into handlers and removing
> the existing open/close code on both the RS and M sides. There may also be
> some changes to the master in-memory state of regions in transition. The new
> load balancer will probably be introduced with this issue but not fully
> integrated yet.
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