Help troubleshooting SqlException: Timeout expired on connection, in a non-load situation

Question

I have a server hosting a website of mine that has almost zero-traffic.
A few people (< 20) enter the site every day, and a few RSS readers are subscribed to some fee

Answer 1

In my case, when I installed sqlserver 2008 r2 sp3,The problem goes away.

Server:Windows 7+SqlServer 2008 R2 (developer edition) client:Raspberrypi 3B+ ,Asp.net Core+EF Core