If my C program uses sockets, binds to
localhost:9025, exchanges some data, gets manually killed and restarted, it sometimes crashes with the error being:
Address already in use.
All SE-recommended software that I've tried to look for “pid that uses port” with have failed to return any process id, so I assume there is no process at that time that uses port
9025, which should be the case.
Nonetheless, from what I've gathered from comments on topically similar questions, it seemed to me that "Address" is "already in use" if and only if a process uses that particular address. Why is this false then?
Now I assume the OS keeps track of what addresses are in use and what are not, but is that the case? If it is though, I would love if you could tell me how do I correct it, because my best solution to this problem is “wait for an undetermined amount of time”.
EDIT: I use Linux 5.2.2-arch1-1-ARCH x86_64