public RegionInfo getDaughterTwoRI() {
    return daughterTwoRI;
  }
The procedure to split a region in a table. Takes lock on the parent region. It holds the lock
for the life of the procedure.
<p>
Throws exception on construction if determines context hostile to spllt (cluster going down or
master is shutting down or table is disabled).
</p>
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java