@Override
  public BlockingRpcChannel createBlockingRpcChannel(final ServerName sn, final User ticket,
    int rpcTimeout) {
    return new BlockingRpcChannelImplementation(this, createAddr(sn), ticket, rpcTimeout);
  }
Configure an hbase rpccontroller
@param controller              to configure
@param channelOperationTimeout timeout for operation
@return configured controller
hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/AbstractRpcClient.java