Spring整合ElasticJob 关闭Tomcat容器时内存泄漏

在完成定时任务的过程中,基本要求完成但是在项目停止的时候,Job 不能正常的去关闭,报出警告:

 org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [***_QuartzSchedulerThread] but has failed to stop it. This is very likely to create a memory ...

原因:servlet容器关闭时发现Job定时器线程还在执行，对其无所适从，不懂怎么办只能强行关闭。

解决思路：在关闭容器时的contextDestroyed事件里检测ServletContext里Job  相关属性，找到Bean然后调用它的方法结束掉

代码：

   1、web.xml 增加一个listener

<listener>    <listener-class>com.***.elasticjob.AppContextListener</listener-class></listener>

2、AppContextListener 代码

public class AppContextListener extends ContextLoader implements ServletContextListener{    private static Logger logger = LoggerFactory.getLogger(AppContextListener.class);    @Override    public void contextInitialized(ServletContextEvent servletContextEvent) {    }    @Override    public void contextDestroyed(ServletContextEvent event) {        logger.info("Destroying Context...");        try {            WebApplicationContext context = (WebApplicationContext) event.getServletContext().getAttribute(                    WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);            String[] beanNames = context.getBeanDefinitionNames();            for(String beanName:beanNames)            {                if(beanName.contains("dangdang")&&beanName.contains("SpringJobScheduler")){                    logger.info("发现dangdang定时任务beanName: "+beanName);                    SpringJobScheduler scheduler = (SpringJobScheduler)context.getBean(beanName);                    scheduler.getSchedulerFacade().shutdownInstance();                }            }        } catch (Exception e) {            logger.error("Error Destroying Context", e);        }    }}

参考文献：

  https://www.cnblogs.com/passedbylove/p/7580477.html

  http://blog.csdn.net/liujun_for_java/article/details/78101478

  http://blog.csdn.net/dslztx/article/details/47276953