TCPConnection stops receiving messages

[mnaranjo]

Hello,

I am trying to maintain a TCP stream connection with an AIS data stream, however after a period of several minutes (it is an indeterminate time, sometimes almost 1h, sometimes not even 15min), the following code appears:

for msg in TCPConnection(AIS_STREAM_IP, port=AIS_STREAM_PORT): print(msg)

stops printing received messages. Could this be due to the implementation of Socket in the TCPConnection object?

I don't get any exception about it, it seems that no more messages arrive and therefore the code waits for more. If I try a connection to the same IP and port with the Telnet command I still receive messages, so the stream has content.

Best regards.

[M0r13n]

@mnaranjo

This sounds odd. I tried to reproduce this phenomenon by establishing a TCP connection with an AIS sender. In my case, the connection never stalls - at least not for 20 minutes (I terminated the program afterwards).

You could try to create a plain old socket and connect to your peer manually to check if the error still occurs:

import socket

host = '153.44.253.27'
port = 5631

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
    sock.connect((host, port))

    while True:
        body = sock.recv(4096)
        for line in body.splitlines():
            print(line)

[mnaranjo]

Thank you for your reply. We are in the process of testing to be able to rule out that it is a problem with the source. The loss of connection is not periodic, and each time it cuts off at a different time interval. In any case, we will consider this option. Thank you very much.

[M0r13n]

@mnaranjo Any updates? May I close this issue?

Best wishes, Leon

[mnaranjo]

Sorry for not responding sooner. Yes, it can be closed, in the end we found that there was an error with the source of the stream. Thank you very much