1. Accessing Tomcat Internals from Servlet (or Filter) stackoverflow.com
I would like to get access to the Tomcat internal data from a servlet (or filter). In particular, I would like to read information about busy threads, from thread pool manager. ...
2. Servlets, filters and threads in Tomcat stackoverflow.com
3. Is it worth cleaning ThreadLocals in Filter to solve thread pool-related issues? stackoverflow.com
In short - tomcat uses a thread pool, so threads are reused. Some libraries use