问题 I am using Quartz to run a job every hour. The servlet is running on Tomcat and I am using the ServletConextListener to listen for when the context is destroyed. When I shut down tomcat, I get the message: "appears to have started a thread named [MyScheduler_Worker-1] but has failed to stop it". But later I see this message: "[DEBUG] 28 Sep 11:45:26.671 AM MyScheduler_Worker-1 [org.quartz.simpl.SimpleThreadPool] WorkerThread is shut down." So is it safe to assume that there is no memory leak