[GitHub] [hbase] infraio commented on issue #631: HBASE-23035 Retain region to the last RegionServer make the failover …

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infraio commented on issue #631: HBASE-23035 Retain region to the last RegionServer make the failover …
URL: https://github.com/apache/hbase/pull/631#issuecomment-533019507
 
 
   > IIRC there is way to interrupt an existing TRSP from SCP, I think in that method we should also do the same thing?
   
   Set forceNewPlan = true too when call serverCrashed. The TRSP may in any state when call this. 
   1. If in REGION_STATE_TRANSITION_GET_ASSIGN_CANDIDATE, forceNewPlan is true then it will choose a round-robin server.
   2. If in REGION_STATE_TRANSITION_OPEN, regionClosedAbnormally will set region location to null then it will go back to REGION_STATE_TRANSITION_GET_ASSIGN_CANDIDATE.
   3. If in REGION_STATE_TRANSITION_CONFIRM_OPENED, it is same to failed open region.
   4. If in REGION_STATE_TRANSITION_CONFIRM_CLOSED, it will go back to REGION_STATE_TRANSITION_GET_ASSIGN_CANDIDATE.
   5. If in REGION_STATE_TRANSITION_CLOSE, it will go back to REGION_STATE_TRANSITION_GET_ASSIGN_CANDIDATE.

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