Hello,
There is a Django application (Python2.7) that is being hosted using Apache 2.4.51. When using OpenSuse Leap 15.2 there were no issues. A system upgrade was done and now we run into issues with leap versions 15.3+. When the app receives a request, this is outputted in the apache logs:
[mpm_prefork:emerg] [pid <>] (49)Identifier removed: AH00144: couldn't grab the accept mutex
[mpm_prefork:emerg] [pid <>] AH00050: Child 23517 returned a Fatal error... Apache is exiting!
A client java app is sending the request to the server and gets this error:
<redacted> because HTTP transport error: java.net.SocketException: Connection reset
Connection refused
The app itself starts up fine and there are no errors. Apache starts okay as well. The errors occur when a request is received. I plan on conducting further tests but wanted to check and see if anyone knows of changes from 15.2 → 15.3 that could have caused this. or, if anyone had ideas of what I could look into to try and resolve the issue. The original dev fled to china and I was left with this legacy app 
I would appreciate any help.