我想在预定时间(23:59 CET 和 08:00 CET)执行两个任务。我创建了一个维护这些方法的 EJB 单例 bean:
@Singleton
public class OfferManager {
@Schedule(hour = "23", minute = "59", timezone = "CET")
@AccessTimeout(value = 0) // concurrent access is not permitted
public void fetchNewOffers() {
Logger.getLogger(OfferManager.class.getName()).log(Level.INFO, "Fetching new offers started");
// ...
Logger.getLogger(OfferManager.class.getName()).log(Level.INFO, "Fetching new offers finished");
}
@Schedule(hour="8", minute = "0", timezone = "CET")
public void sendMailsWithReports() {
Logger.getLogger(OfferManager.class.getName()).log(Level.INFO, "Generating reports started");
// ...
Logger.getLogger(OfferManager.class.getName()).log(Level.INFO, "Generating reports finished");
}
}
问题是这两个任务都执行了两次。服务器为 WildFly Beta1,配置为 UTC 时间。
以下是一些可能有用的服务器日志:
2013-10-20 11:15:17,684 INFO [org.jboss.as.server] (XNIO-1 task-7) JBAS018559: Deployed "crawler-0.3.war" (runtime-name : "crawler-0.3.war")
2013-10-20 21:59:00,070 INFO [com.indeed.control.OfferManager] (EJB default - 1) Fetching new offers started
....
2013-10-20 22:03:48,608 INFO [com.indeed.control.OfferManager] (EJB default - 1) Fetching new offers finished
2013-10-20 23:59:00,009 INFO [com.indeed.control.OfferManager] (EJB default - 2) Fetching new offers started
....
2013-10-20 23:59:22,279 INFO [com.indeed.control.OfferManager] (EJB default - 2) Fetching new offers finished
这种行为的原因可能是什么?