Question

我每小时都在使用Quartz来完成一项工作。 servlet在Tomcat上运行，我正在使用ServletConextListener来监听上下文被破坏的时间。

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]但未能阻止它的线程”。

但后来我看到了这条消息：

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

WorkerThread已关闭。“

因此可以安全地假设因为这个线程没有内存泄漏吗？

以下是我的日志的外观：

{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，但万一其他人正在寻找它。

我们一直用来获取线程的警告，直到我们在ServletContextListener.shutDown（）方法中添加代码来关闭Quartz Scheduler。

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;
                }
            }

Answer 2

您可以假设没有内存泄漏，因为您看到了线程关闭消息。但是，可以通过在关闭之前清除线程来发出警告。

The shutdown-hook plugin catches the event of the JVM terminating, and calls shutdown on the scheduler.

详细信息： - http://quartz-scheduler.org/documentation/quartz-2.x/configuration/ConfigPlugins

石英：内存泄漏？

2 个答案: