求高手指教

org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/LDY]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3920)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1357)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1451)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:296)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
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.IllegalArgumentException: Servlet mapping specifies an unknown servlet name ProductTypeChildServlet
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3213)
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3192)
at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1305)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1349)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5173)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
2012-10-27 0:38:19 org.apache.catalina.core.StandardContext reload
信息: Reloading Context with name [/LDY] is completed
--------------------编程问答-------------------- 给个描述呗 --------------------编程问答-------------------- --------------------编程问答-------------------- --------------------编程问答-------------------- 我也出现这个问题了，启动tomcat时就有严重，一样的程序在别的电脑上就没有

补充：Java ,  Eclipse