Why the nodejs net socket does not send the data in the first connection?

Hello,

this is my code in lambda which runs based on SQS messages arrival.

var net = require('net'); let client = new net.Socket(); console.log(" ------------------- Attempt to connect... --------------------"); client.connect(port, 'ip', () => { console.log(" ------------------- Connected --------------------"); client.write(jsonres.raw_message); //This will send the byte buffer over TCP console.log(" ------------------- Message Sent! --------------------"); client.end(); console.log(" ------------------- Disconnected --------------------"); });

If I run this code from my PC it works but from AWS lambda I don't reach "connected" state. In the pcap I see the TCP init with 3 messages, SYN + SYN/ACK + ACK but no PSH/data. Why? If I send another message in short time I will get the first message in the serveer... It's like its on holding in AWS and just sent in the next connect... delay/Promise does not work. any idea?