I have written a small Python program that needs to continuously listen on port 2237. The packets are received from one program, which I will call P1. There is also another program, P2, that receives commands from P1. Both P1 and P2 use port 2237. My problem is that when I start my Python script, it successfully receives data from P1, but it fails to receive data from P2. The functionality only works again after I stop my program. The Python script for receiving the packets is: def run(udp_port: int): logger.info("Starting listener on port %d", udp_port) client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) client.setsockopt() client.bind(("", udp_port)) while True: data, addr = client.recvfrom(4096) src_ip, src_port = addr logger.debug("Received %d bytes from %s:%d", len(data), src_ip, src_port) hexdump(data, logging.DEBUG) try: payload = parse_message(data) if payload is not None: logger.info("%r", payload) except Exception as e: logger.error("Failed to parse header: %s", e) Does anyone know what the root cause of this issue is, and how we can fix it?

I have written a small Python program that needs to continuously listen on port 2237. The packets are received from one program, which I will call P1. There is also another program, P2, that receives commands from P1. Both P1 and P2 use port 2237. My problem is that when I start my Python script, it successfully receives data from P1, but it fails to receive data from P2. The functionality only works again after I stop my program. The Python script for receiving the packets is: def run(udp_port: int): logger.info("Starting listener on port %d", udp_port) client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) client.setsockopt() client.bind(("", udp_port)) while True: data, addr = client.recvfrom(4096) src_ip, src_port = addr logger.debug("Received %d bytes from %s:%d", len(data), src_ip, src_port) hexdump(data, logging.DEBUG) try: payload = parse_message(data) if payload is not None: logger.info("%r", payload) except Exception as e: logger.error("Failed to parse header: %s", e) What could be causing this conflict? Is there a known issue where an active UDP listener process interferes with two other applications (P1 and P2) communicating on the same port? Any ideas or suggested workarounds would be helpful!