1、错误描述

2014-7-13 1:34:46 org.apache.catalina.startup.HostConfig undeploy
信息: Undeploying context [/blazeds]
2014-7-13 1:34:46 org.apache.catalina.core.ApplicationContext log
严重: Servlet MessageBrokerServlet threw unload() exception
javax.servlet.ServletException: Servlet.destroy() for servlet MessageBrokerServlet threw exception
	at org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:1507)
	at org.apache.catalina.core.StandardWrapper.stopInternal(StandardWrapper.java:1847)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5647)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
	at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:1028)
	at org.apache.catalina.startup.HostConfig.undeploy(HostConfig.java:1478)
	at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1426)
	at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1626)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:328)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
	at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1374)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1530)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
	at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1519)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NoClassDefFoundError: flex/messaging/io/BeanProxy
	at flex.messaging.MessageBroker.stop(MessageBroker.java:382)
	at flex.messaging.MessageBrokerServlet.destroy(MessageBrokerServlet.java:243)
	at org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:1486)
	... 16 more
Caused by: java.lang.ClassNotFoundException: flex.messaging.io.BeanProxy
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	... 19 more

3、解决办法