解决tomcat:Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context XXX

今天部署WEB应用时，出现tomcat可以正常启动，但是WEB应用没有正常启动的问题，访问jsp正常，访问servelt,action出现404错误，而且tomcat的启动过程中控制台还打印下面的一句话：Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context XXX（应用名称），整个启动过程如下日志如下：

2014-6-17 16:24:09 org.apache.tomcat.util.digester.SetPropertiesRule begin警告: [SetPropertiesRule]{Server/Service/Executor} Setting property 'maxSpareThreads' to '1000' did not find a matching property.2014-6-17 16:24:09 org.apache.catalina.core.AprLifecycleListener init信息: Loaded APR based Apache Tomcat Native library 1.1.22.2014-6-17 16:24:09 org.apache.catalina.core.AprLifecycleListener init信息: APR capabilities: IPv6 [false], sendfile [true], accept filters [false], random [true].2014-6-17 16:24:10 org.apache.coyote.http11.Http11AprProtocol init信息: Initializing Coyote HTTP/1.1 on http-80802014-6-17 16:24:10 org.apache.coyote.ajp.AjpAprProtocol init信息: Initializing Coyote AJP/1.3 on ajp-80892014-6-17 16:24:10 org.apache.catalina.startup.Catalina load信息: Initialization processed in 1247 ms2014-6-17 16:24:10 org.apache.catalina.core.StandardService start信息: Starting service Catalina2014-6-17 16:24:10 org.apache.catalina.core.StandardEngine start信息: Starting Servlet Engine: Apache Tomcat/6.0.352014-6-17 16:24:10 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor cas.xml2014-6-17 16:24:10 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\appinside the host appBase has been specified, and will be ignored2014-6-17 16:24:11 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:11 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/cas'2014-6-17 16:24:11 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:11 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor host-manager.xml2014-6-17 16:24:11 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor manager.xml2014-6-17 16:24:11 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor solr.xml2014-6-17 16:24:11 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\solr inside the host appBase has been specified, and will be ignored2014-6-17 16:24:11 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor app.xml2014-6-17 16:24:11 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\app inside the host appBase has been specified, and will be ignored2014-6-17 16:24:12 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:12 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/app1'2014-6-17 16:24:12 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:12 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor app1.xml2014-6-17 16:24:12 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\app1 inside the host appBase has been specified, and will be ignored2014-6-17 16:24:13 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:13 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/app2'2014-6-17 16:24:13 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:13 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor app2.xml2014-6-17 16:24:13 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\app2inside the host appBase has been specified, and will be ignored2014-6-17 16:24:14 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:14 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/app3'2014-6-17 16:24:14 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:14 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor app3.xml2014-6-17 16:24:14 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\app4inside the host appBase has been specified, and will be ignored2014-6-17 16:24:14 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:14 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/app4'2014-6-17 16:24:15 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:15 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor app4.xml2014-6-17 16:24:15 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\app5inside the host appBase has been specified, and will be ignored2014-6-17 16:24:15 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:15 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/app5'2014-6-17 16:24:15 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:15 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor app5.xml2014-6-17 16:24:15 org.apache.catalina.startup.HostConfig deployDescriptor警告: A docBase D:\apache-tomcat-6.0.35\webapps\app6 inside the host appBase has been specified, and will be ignored2014-6-17 16:24:16 com.sun.faces.config.ConfigureListener$WebXmlProcessor scanForFacesServlet警告: Unable to process deployment descriptor for context 'null'2014-6-17 16:24:16 com.sun.faces.config.ConfigureListener contextInitialized信息: Initializing Sun's JavaServer Faces implementation (1.2_04-b07-FCS) for context '/app6'2014-6-17 16:24:16 org.apache.catalina.session.PersistentManagerBase start严重: No Store configured, persistence disabled2014-6-17 16:24:16 org.apache.catalina.startup.HostConfig deployDirectory信息: Deploying web application directory classes2014-6-17 16:24:16 org.apache.catalina.startup.HostConfig deployDirectory信息: Deploying web application directory docs2014-6-17 16:24:16 org.apache.catalina.startup.HostConfig deployDirectory信息: Deploying web application directory examples2014-6-17 16:24:16 org.apache.catalina.startup.HostConfig deployDirectory信息: Deploying web application directory ROOT2014-6-17 16:24:16 org.apache.coyote.http11.Http11AprProtocol start信息: Starting Coyote HTTP/1.1 on http-80802014-6-17 16:24:16 org.apache.coyote.ajp.AjpAprProtocol start信息: Starting Coyote AJP/1.3 on ajp-80892014-6-17 16:24:16 org.apache.catalina.startup.Catalina start信息: Server startup in 6310 ms

在网上查找了一下大多多说是jar冲突引起的，但是这个项目在其他机器上是正常运行的。以为是环境的问题，所以把tomcat,jdk全都换了一遍，但是出现这个问题。后来就想是不是应用包有什么问题，检查时发现每个应用的web.xml文件全都没有了，把web.xml都添加上之后项目运行正常了。但是很奇怪web.xml文件怎么会就没有了， 之前也遇到tomcat（v6.0.35）启动中出现问题，导致web.xml文件丢失的问题?????