spring MVC启动时异常，去掉<load-on-startup>1</load-on-startup>就没错了

严重: StandardWrapper.Throwable
java.lang.NullPointerException
at org.springframework.core.SerializableTypeWrapper$TypeProxyInvocationHandler.invoke(SerializableTypeWrapper.java:239)
at org.springframework.core.$Proxy4.hashCode(Unknown Source)
at org.springframework.util.ObjectUtils.nullSafeHashCode(ObjectUtils.java:273)
at org.springframework.core.ResolvableType.hashCode(ResolvableType.java:811)
at org.springframework.util.ConcurrentReferenceHashMap.getHash(ConcurrentReferenceHashMap.java:214)
at org.springframework.util.ConcurrentReferenceHashMap.getReference(ConcurrentReferenceHashMap.java:246)
at org.springframework.util.ConcurrentReferenceHashMap.get(ConcurrentReferenceHashMap.java:226)
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1207)
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1177)
at org.springframework.core.ResolvableType.forTypes(ResolvableType.java:856)
at org.springframework.core.ResolvableType.getInterfaces(ResolvableType.java:403)
at org.springframework.core.ResolvableType.as(ResolvableType.java:365)
at org.springframework.core.convert.support.GenericConversionService.getRequiredTypeInfo(GenericConversionService.java:286)
at org.springframework.core.convert.support.GenericConversionService.addConverterFactory(GenericConversionService.java:118)
at org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:86)
at org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:67)
at org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:54)
at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:41)
at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:112)
at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
at org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
at org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4149)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4458)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
2015-3-31 9:20:01 org.apache.catalina.core.StandardContext loadOnStartup
严重: Servlet /expososo threw load() exception
java.lang.NullPointerException
at org.springframework.core.SerializableTypeWrapper$TypeProxyInvocationHandler.invoke(SerializableTypeWrapper.java:239)
at org.springframework.core.$Proxy4.hashCode(Unknown Source)
at org.springframework.util.ObjectUtils.nullSafeHashCode(ObjectUtils.java:273)
at org.springframework.core.ResolvableType.hashCode(ResolvableType.java:811)
at org.springframework.util.ConcurrentReferenceHashMap.getHash(ConcurrentReferenceHashMap.java:214)
at org.springframework.util.ConcurrentReferenceHashMap.getReference(ConcurrentReferenceHashMap.java:246)
at org.springframework.util.ConcurrentReferenceHashMap.get(ConcurrentReferenceHashMap.java:226)
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1207)
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1177)
at org.springframework.core.ResolvableType.forTypes(ResolvableType.java:856)
at org.springframework.core.ResolvableType.getInterfaces(ResolvableType.java:403)
at org.springframework.core.ResolvableType.as(ResolvableType.java:365)
at org.springframework.core.convert.support.GenericConversionService.getRequiredTypeInfo(GenericConversionService.java:286)
at org.springframework.core.convert.support.GenericConversionService.addConverterFactory(GenericConversionService.java:118)
at org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:86)
at org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:67)
at org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:54)
at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:41)
at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:112)
at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
at org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
at org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4149)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4458)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
2015-3-31 9:20:01 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2015-3-31 9:20:02 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2015-3-31 9:20:02 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/45  config=null
2015-3-31 9:20:02 org.apache.catalina.startup.Catalina start