DB Connection Stuck during Login #22
Description
We have an application that occasionally stuck and the stack trace shows that it goes into this branch and eventually at stuck at a network read in go runtime code.
https://github.com/thda/tds/blob/master/buffer.go#L202
May I know the intention of this readPkt call after EOF encountered?
We don't have any timeout params set as part of the conn string, so from the code, it looks like it is going to take defaultLoginTimeout = 20, which is in seconds. but it doesn't look like this timeout is kicking in for us either. The process is stuck for at least 2 hours - very likely at the exact same place.
From our investigation, we can see from the host netstat output that the connection is in ESTABLISHED state and from the Sybase Text Report that the DB server agrees with that.
I will try to post the stack trace, but it is a bit challenging to get it out from firm network. It is essentially coming from newSession(...) in session.go, then login(...), then initState(...)