I am experiencing some issues when my webapp is getting lots of simultaneous connections (ie. when the service is starting).
I am expecting at a certain level of charge to have tomcat answer that he can't take more, by answer an error with code 503.
I have read the documentation and understood (I hope) the usage of maxThreads, acceptCount and maxConnections.
I also read lots of posts:

• How can I produce a 503 error locally with Tomcat?
• https://netflixtechblog.com/tuning-tomcat-for-a-high-throughput-fail-fast-system-e4d7b2fc163f

but I was not able to reproduce a tomcat answering 503, even by setting maxThreads to 1.

As I find lots of posts on how to solve 503 issues, I am obviously missing something... Can anyone help?