求助，关于cas的问题……
小弟是新手，第一次接触这些东西……在部署CAS单点登录服务器的时候，一切正常，可是当改为连接mysql认证的方式之后，cas就进不去了……实在弄不明白是怎么回事……求助各位高手帮忙看看……
这是tomcat的日志：
五月 15, 2012 6:32:07 上午 org.apache.coyote.http11.Http11Protocol destroy
信息: Stopping Coyote HTTP/1.1 on http-8080
五月 15, 2012 6:32:07 上午 org.apache.coyote.http11.Http11Protocol destroy
信息: Stopping Coyote HTTP/1.1 on http-8443
五月 15, 2012 6:32:07 上午 org.apache.catalina.mbeans.ServerLifecycleListener lifecycleEvent
严重: destroyMBeans: Throwable
javax.management.MalformedObjectNameException: Cannot create object name for org.apache.catalina.connector.Connector@f36494
at org.apache.catalina.mbeans.MBeanUtils.createObjectName(MBeanUtils.java:764)
at org.apache.catalina.mbeans.MBeanUtils.destroyMBean(MBeanUtils.java:1416)
at org.apache.catalina.mbeans.ServerLifecycleListener.destroyMBeans(ServerLifecycleListener.java:678)
at org.apache.catalina.mbeans.ServerLifecycleListener.destroyMBeans(ServerLifecycleListener.java:1005)
at org.apache.catalina.mbeans.ServerLifecycleListener.destroyMBeans(ServerLifecycleListener.java:971)
at org.apache.catalina.mbeans.ServerLifecycleListener.lifecycleEvent(ServerLifecycleListener.java:154)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:748)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:643)
at org.apache.catalina.startup.Catalina.start(Catalina.java:618)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

五月 15, 2012 6:32:09 上午 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/i386:/lib:/usr/lib
五月 15, 2012 6:32:09 上午 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
五月 15, 2012 6:32:09 上午 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8443
五月 15, 2012 6:32:09 上午 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 845 ms
五月 15, 2012 6:32:09 上午 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
五月 15, 2012 6:32:09 上午 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.24
五月 15, 2012 6:32:09 上午 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deploying configuration descriptor manager.xml
五月 15, 2012 6:32:10 上午 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deploying configuration descriptor host-manager.xml
五月 15, 2012 6:32:10 上午 org.apache.catalina.startup.HostConfig deployWAR
信息: Deploying web application archive cas.war
五月 15, 2012 6:32:11 上午 org.apache.catalina.core.StandardContext start
严重: Error filterStart
五月 15, 2012 6:32:11 上午 org.apache.catalina.core.StandardContext start
严重: Context [/cas] startup failed due to previous errors
五月 15, 2012 6:32:11 上午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
五月 15, 2012 6:32:11 上午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: A web application appears to have started a thread named [Thread-2] but has failed to stop it. This is very likely to create a memory leak.