using a FL version Tomcat fails to shutdown due to a running thread.
The logs during shutdown read the following:
SEVERE: The web application [/xyz] appears to have started a thread named [pool-1-thread-1] but has failed to stop it. This is very likely to create a memory leak. Jul 29, 2016 11:12:01 AM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks [... snip ...] Jul 29, 2016 11:12:01 AM org.apache.coyote.AbstractProtocol stop INFO: Stopping ProtocolHandler ["http-bio-8080"] Jul 29, 2016 11:12:07 AM org.apache.tomcat.util.net.AbstractEndpoint shutdownExecutor WARNING: The executor associated with thread pool [http-bio-8080] has not fully shutdown. Some application threads may still be running.