项目异常求解

严重: Exception invoking periodic operation: 
java.lang.NoClassDefFoundError: org/apache/struts2/util/ObjectFactoryDestroyable
at org.apache.struts2.dispatcher.Dispatcher.cleanup(Dispatcher.java:263)
at org.apache.struts2.dispatcher.FilterDispatcher.destroy(FilterDispatcher.java:238)
at org.apache.catalina.core.ApplicationFilterConfig.release(ApplicationFilterConfig.java:332)
at org.apache.catalina.core.StandardContext.filterStop(StandardContext.java:3731)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4493)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1097)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1203)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:619)