Message1690

I see that your code for this is using socket.makefile().

We know that simultaneously reading and writing on the same socket file wrapper can cause a deadlock, cf bug 1744567 that you reported. That might explain the curtailment of the output; the server thread might be hung on the write.

Does the problem still happen if you use the socket.send and socket.recv methods directly?

Meantime, I will look into the hostnames issue.