[split] Flask OSError: [Errno 98] Address already in use

[ndc85430]

I mean, it really sounds like a network problem. I disagree when you say it's about a shared directory - why would a web server have knowledge of that?

Does netstat show TCP sockets without -t? Is there more than one interface on the machine? Are the commands looking at all of them (I forget what netstat does by default)?

Out of curiosity, are you on an older Unix that doesn't have ss?