This keeps happening because of morons who can't code and cause a ton of unclosed TCP connections to fill up. Among those responsible are the creators of the WHOIS mod (however not many people use it).
I was unaware the connections were remaining, when I was testing this, the onDisconnect() function was always called. I find it odd that problems are arising now, this has been running on some servers for several days now.
However, if this has been the cause, I thoroughly apologies for any problems caused by this.
Is that that BlockOS mod?
No, the app will be fine. Apparently the server-sided collection is causing problems