src/main/java/com/alipay/remoting/rpc/RpcClient.java
public void closeConnection(String addr) {
        Url url = this.addressParser.parse(addr);
        this.connectionManager.remove(url.getUniqueKey());
    }
public void closeConnection(String addr) {
        Url url = this.addressParser.parse(addr);
        this.connectionManager.remove(url.getUniqueKey());
    }
Close all connections of a address

@param addr