Table will be disabling forever
-------------------------------

                 Key: HBASE-5571
                 URL: https://issues.apache.org/jira/browse/HBASE-5571
             Project: HBase
          Issue Type: Bug
          Components: master, regionserver
            Reporter: chunhui shen
            Assignee: chunhui shen


If we restart master when it is disabling one table, the table will be 
disabling forever.

In current logic, Region CLOSE RPC will always returned 
NotServingRegionException because RS has already closed the region before we 
restart master. So table will be disabling forever because the region will in 
RIT all along.

In another case, when AssignmentManager#rebuildUserRegions(), it will put 
parent regions to AssignmentManager.regions, so we can't close these parent 
regions until it is purged by CatalogJanitor if we execute disabling the table.

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