channel配置时一个小问题

　　【问题描述】
　　如果在message-config.xml中加入这样的配置   my-polling-amf  就会出下面的错 2011-6-22 11:05:57 org.apache.catalina.core.StandardEngine start 信息: Starting Servlet Engine: Apache Tomcat/6.0.14 **** MessageBrokerServlet failed to initialize due to runtime exception: Exception: flex.messaging.config.ConfigurationException: Unexpected text 'my-polling-amf' found in 'channels' from file: messaging-config.xml. at flex.messaging.config.AbstractConfigurationParser. allowedChildElements(AbstractConfigurationParser.ja va:283) at flex.messaging.config.ServerConfigurationParser.de stinationChannels(ServerConfigurationParser.java:89 7) at flex.messaging.config.ServerConfigurationParser.de stination(ServerConfigurationParser.java:856) at flex.messaging.config.ServerConfigurationParser.se rvice(ServerConfigurationParser.java:628) at flex.messaging.config.ServerConfigurationParser.se rviceInclude(ServerConfigurationParser.java:495) at flex.messaging.config.ServerConfigurationParser.se rvices(ServerConfigurationParser.java:468) at flex.messaging.config.ServerConfigurationParser.pa rseTopLevelConfig(ServerConfigurationParser.java:63 ) at flex.messaging.config.AbstractConfigurationParser. parse(AbstractConfigurationParser.java:69) at flex.messaging.config.FlexConfigurationManager.get MessagingConfiguration(FlexConfigurationManager.jav a:79) at flex.messaging.MessageBrokerServlet.init(MessageBr okerServlet.java:106) at org.apache.catalina.core.StandardWrapper.loadServl et(StandardWrapper.java:1161) at org.apache.catalina.core.StandardWrapper.load(Stan dardWrapper.java:981) at org.apache.catalina.core.StandardContext.loadOnSta rtup(StandardContext.java:4045) at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4351) at org.apache.catalina.core.ContainerBase.addChildInt ernal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(Co ntainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(Sta ndardHost.java:525) at org.apache.catalina.startup.HostConfig.deployDescr iptor(HostConfig.java:626) at org.apache.catalina.startup.HostConfig.deployDescr iptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps( HostConfig.java:488) at org.apache.catalina.startup.HostConfig.start(HostC onfig.java:1138) at org.apache.catalina.startup.HostConfig.lifecycleEv ent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLife cycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1053) at org.apache.catalina.core.StandardHost.start(Standa rdHost.java:719) at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(Stan dardEngine.java:443) at org.apache.catalina.core.StandardService.start(Sta ndardService.java:516) at org.apache.catalina.core.StandardServer.start(Stan dardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalin a.java:566) at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootst rap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstr ap.java:413) 2011-6-22 11:06:01 org.apache.catalina.core.ApplicationContext log 信息: Marking servlet MessageBrokerServlet as unavailable 2011-6-22 11:06:01 org.apache.catalina.core.StandardContext loadOnStartup 严重: Servlet /samples threw load() exception javax.servlet.UnavailableException: Unexpected text 'my-polling-amf' found in 'channels' from file: messaging-config.xml. at flex.messaging.MessageBrokerServlet.init(MessageBr okerServlet.java:170) at org.apache.catalina.core.StandardWrapper.loadServl et(StandardWrapper.java:1161) at org.apache.catalina.core.StandardWrapper.load(Stan dardWrapper.java:981) at org.apache.catalina.core.StandardContext.loadOnSta rtup(StandardContext.java:4045) at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4351) at org.apache.catalina.core.ContainerBase.addChildInt ernal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(Co ntainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(Sta ndardHost.java:525) at org.apache.catalina.startup.HostConfig.deployDescr iptor(HostConfig.java:626) at org.apache.catalina.startup.HostConfig.deployDescr iptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps( HostConfig.java:488) at org.apache.catalina.startup.HostConfig.start(HostC onfig.java:1138) at org.apache.catalina.startup.HostConfig.lifecycleEv ent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLife cycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1053) at org.apache.catalina.core.StandardHost.start(Standa rdHost.java:719) at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(Stan dardEngine.java:443) at org.apache.catalina.core.StandardService.start(Sta ndardService.java:516) at org.apache.catalina.core.StandardServer.start(Stan dardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalin a.java:566) at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootst rap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstr ap.java:413) Constructed Start 2011-6-22 11:06:03 org.apache.coyote.http11.Http11AprProtocol start 信息: Starting Coyote HTTP/1.1 on http-8400 2011-6-22 11:06:03 org.apache.coyote.ajp.AjpAprProtocol start 信息: Starting Coyote AJP/1.3 on ajp-8009 2011-6-22 11:06:03 org.apache.catalina.startup.Catalina start 信息: Server startup in 6193 ms 把my-polling-amf去掉就没有问题了，不知道是为什么
　　【分析】
　　Unexpected text 'my-polling-amf' found in 'channels' from file: messaging-config.xml.
　　错误提示中的这一句说明my-polling-amf的配置有问题
　　参考一下别的channel配置发现问题所在，是自己写的有问题。
　　【解决】