src/main/java/com/alipay/remoting/rpc/RpcClient.java
public Connection createStandaloneConnection(String ip, int port, int connectTimeout)
                                                                                         throws RemotingException {
        return this.connectionManager.create(ip, port, connectTimeout);
    }
public Connection createStandaloneConnection(String ip, int port, int connectTimeout)
                                                                                         throws RemotingException {
        return this.connectionManager.create(ip, port, connectTimeout);
    }
Create a stand alone connection using ip and port. <br>
<p>
Notice:<br>
<li>Each time you call this method, will create a new connection.
<li>Bolt will not control this connection.
<li>You should use {@link #closeStandaloneConnection} to close it.

@param ip
@param port
@param connectTimeout
@return
@throws RemotingException