We currently ship our AppServer on Tomcat 9.0.13. We like to update to a more recent version when we ship a new release. However, Tomcat refuses to stop, on both Windows and Linux, when we go past 9.0.13. I know that it has something to do with our main web application as Tomcat does shut down when it isn't deployed. We also have Replaced Tomcat's Juli logger with Logback. For some reason, the 9.0.21 version of this library has not been released.
I'm looking for suggestions on tracking this down. At shutdown, we see a number of logback threads as well as some additional threads we create to watch resources through possible memory leak exceptions. Anyways, I am looking for suggestions on tracking this down. I'm able to attach to the process with Eclipse, but it hasn't helped point me at what the cause is. Thanks Dave
