"Port already in use" error when restarting client after connection loss

[ricardoapaes]

While using the client software on a Windows machine, I noticed instances where it would stop functioning. I realized that when the internet connection dropped (internet connectivity in Brazil can be unreliable), the software wouldn't detect the outage and would stop working (which is expected). However, when the connection was restored, the software often failed to resume, especially after prolonged periods (more than 10 minutes).
As a workaround, I created a tool that polled for connectivity every minute. If the connection dropped, it would stop and restart the client. Unfortunately, I encountered a recurring issue: the error "port already in use" occurred frequently. After examining the code, I couldn't identify any obvious improvements, as it seemed to already include checks for removing stale connections.