public static TransitRegionStateProcedure move(MasterProcedureEnv env, RegionInfo region,
    @Nullable ServerName targetServer) {
    return setOwner(env, new TransitRegionStateProcedure(env, region, targetServer,
      targetServer == null, TransitionType.MOVE));
  }
At end of timeout, wake ourselves up so we run again.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/TransitRegionStateProcedure.java