tomcat - quartz : Memory Leak?

Question

我正在使用 Quartz 每小时运行一次作业。 servlet 在 Tomcat 上运行，我使用 ServletConextListener 来监听上下文何时被销毁。

当我关闭 tomcat 时，我收到消息:

“似乎已经启动了一个名为 [MyScheduler_Worker-1] 的线程，但未能停止它”。

但后来我看到这条消息:

[DEBUG] 28 Sep 11:45:26.671 AM MyScheduler_Worker-1 [org.quartz.simpl.SimpleThreadPool]

WorkerThread 已关闭。”

那么可以安全地假设没有内存泄漏是因为这个线程吗？

这是我的日志的样子:

{SEVERE: The web application [/*************] appears to have started a thread

named [MyScheduler_Worker-1] but has failed to stop it. This is very likely to c

reate a memory leak.

Sep 28, 2011 11:45:26 AM org.apache.catalina.loader.WebappClassLoader clearRefer

encesThreads

SEVERE: The web application [/*************] appears to have started a thread

named [MyScheduler_Worker-2] but has failed to stop it. This is very likely to c

reate a memory leak.

Sep 28, 2011 11:45:26 AM org.apache.catalina.loader.WebappClassLoader clearRefer

encesThreads

SEVERE: The web application [/*************] appears to have started a thread

named [MyScheduler_Worker-3] but has failed to stop it. This is very likely to c

reate a memory leak.

[DEBUG] 28 Sep 11:45:26.671 AM MyScheduler_Worker-2 [org.quartz.simpl.SimpleThre

adPool]

WorkerThread is shut down.



[DEBUG] 28 Sep 11:45:26.671 AM MyScheduler_Worker-1 [org.quartz.simpl.SimpleThre

adPool]

WorkerThread is shut down.



[DEBUG] 28 Sep 11:45:26.671 AM MyScheduler_Worker-3 [org.quartz.simpl.SimpleThre

adPool]

WorkerThread is shut down.

Answer 1

我知道这是一个旧线程，但以防其他人正在寻找它。

在我们添加代码以在 ServletContextListener.shutDown() 方法中关闭 Quartz Scheduler 之前，我们一直都在获取线程的警告。

关闭调度程序:

            quartzScheduler.shutdown();

            int ct = 0;

            // Try waiting for the scheduler to shutdown. Only wait 30 seconds.
            while(ct < 30) {
                ct++;
                // Sleep for a second so the quartz worker threads die.  This 
                // suppresses a warning from Tomcat during shutdown.
                Thread.sleep(1000);
                if (quartzScheduler.isShutdown()) {
                    break;
                }
            }