@Override
public UnassignRegionResponse unassignRegion(RpcController controller,
UnassignRegionRequest req) throws ServiceException {
try {
final byte [] regionName = req.getRegion().getValue().toByteArray();
RegionSpecifierType type = req.getRegion().getType();
final boolean force = req.getForce();
UnassignRegionResponse urr = UnassignRegionResponse.newBuilder().build();
master.checkInitialized();
if (type != RegionSpecifierType.REGION_NAME) {