Errors in log on shutdown after upgrading to 3.1

Nov 20, 2009 11:24:58 AM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-8080
Nov 20, 2009 11:24:59 AM org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina
Nov 20, 2009 11:25:20 AM org.apache.tomcat.util.modeler.Registry unregisterComponent
SEVERE: Error unregistering mbean 
java.lang.NullPointerException
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:243)
	at org.slf4j.bridge.SLF4JBridgeHandler.getSLF4JLogger(SLF4JBridgeHandler.java:159)
	at org.slf4j.bridge.SLF4JBridgeHandler.publish(SLF4JBridgeHandler.java:244)
	at java.util.logging.Logger.log(Logger.java:458)
	at java.util.logging.Logger.doLog(Logger.java:480)
	at java.util.logging.Logger.logp(Logger.java:596)
	at com.sun.jmx.trace.TraceManager.send(TraceManager.java:219)
	at com.sun.jmx.trace.Trace.send(Trace.java:110)
	at com.sun.jmx.mbeanserver.Repository.trace(Repository.java:72)
	at com.sun.jmx.mbeanserver.Repository.trace(Repository.java:77)
	at com.sun.jmx.mbeanserver.Repository.contains(Repository.java:472)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.isRegistered(DefaultMBeanServerInterceptor.java:593)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.isRegistered(JmxMBeanServer.java:598)
	at org.apache.tomcat.util.modeler.Registry.unregisterComponent(Registry.java:573)
	at org.apache.catalina.loader.WebappLoader.stop(WebappLoader.java:720)
	at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4557)
	at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:924)
	at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1191)
	at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1162)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:313)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1086)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
	at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
	at org.apache.catalina.core.StandardService.stop(StandardService.java:584)
	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
	at org.apache.catalina.startup.Catalina.stop(Catalina.java:628)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:603)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Nov 20, 2009 11:25:20 AM org.apache.tomcat.util.modeler.Registry unregisterComponent
SEVERE: Error unregistering mbean 
java.lang.NullPointerException
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:243)
	at org.slf4j.bridge.SLF4JBridgeHandler.getSLF4JLogger(SLF4JBridgeHandler.java:159)
	at org.slf4j.bridge.SLF4JBridgeHandler.publish(SLF4JBridgeHandler.java:244)
	at java.util.logging.Logger.log(Logger.java:458)
	at java.util.logging.Logger.doLog(Logger.java:480)
	at java.util.logging.Logger.logp(Logger.java:596)
	at com.sun.jmx.trace.TraceManager.send(TraceManager.java:219)
	at com.sun.jmx.trace.Trace.send(Trace.java:110)
	at com.sun.jmx.mbeanserver.Repository.trace(Repository.java:72)
	at com.sun.jmx.mbeanserver.Repository.trace(Repository.java:77)
	at com.sun.jmx.mbeanserver.Repository.contains(Repository.java:472)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.isRegistered(DefaultMBeanServerInterceptor.java:593)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.isRegistered(JmxMBeanServer.java:598)
	at org.apache.tomcat.util.modeler.Registry.unregisterComponent(Registry.java:573)
	at org.apache.catalina.loader.WebappLoader.destroy(WebappLoader.java:592)
	at org.apache.catalina.loader.WebappLoader.stop(WebappLoader.java:727)
	at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4557)
	at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:924)
	at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1191)
	at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1162)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:313)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1086)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
	at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
	at org.apache.catalina.core.StandardService.stop(StandardService.java:584)
	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)
	at org.apache.catalina.startup.Catalina.stop(Catalina.java:628)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:603)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Nov 20, 2009 11:25:20 AM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8080