Galaxy - connections accidentally increasing and server down

I deployed application to Galaxy.

My problem is that connections are accidentally increasing and server is down with
"The container has run out of memory A new container will be started to replace it" error log.

I haven’t launched my app publicly, so there is no reason to increase connections from 3~4 to 1~3000.
The weird thing is when I checked kadira, I can’t see the connection increasing.

My local is working fine…
What is the problem?

I also submiited ticket to Galaxy support, but no response yet.