[jira] [Created] (HBASE-22631) assign failed may make gced parent region appear again !!!

["yuhuiyang (JIRA)" <ji...@apache.org>]

yuhuiyang created HBASE-22631:
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             Summary: assign failed may make gced parent region appear again !!!
                 Key: HBASE-22631
                 URL: https://issues.apache.org/jira/browse/HBASE-22631
             Project: HBase
          Issue Type: Bug
          Components: proc-v2
    Affects Versions: 2.1.1
            Reporter: yuhuiyang


When i assign a region A the process is as follows：

step1 : A is assigned to rs1 , and rs1 fails to open it .

step2 : assignProcedure handleFailure .

step3 : A is assign to rs2 and rs success to open it .

Above is the normal flow . However when rs1 is restart after the reigon A was split and GCRegionProcedure was successed , the region A appare again !

The region is that reigon A is not removed from the serverMap correctly when assignprocedure handleFailure . Because the code regionNode.offline() make the regionNode's regionLocation to be null and make regionNode's state to OFFLINE . So when the code env.getAssignmentManager().undoRegionAsOpening(regionNode) do nothing . So when the rs1 restart event triggers a serverCrashProcedure, it will get reigons from serverMap and it will get the region A then A will be assigned and hdfs dir will be created. 



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