QQ号为什么登不上去，也重新安装了qq、网络连接正常、、就是登不上那个去。。。老显示服务器超时。

罗技g703hero丢帧严重
首先排除硬件、软件的问题
第二排除游戏服务器、ping值等问题
第三确保具有24G的路由器距离鼠标2米以上（有条件的话关闭24G使用5G，什么？没有5G？那换双频的）
第四确保无线接收器距离鼠标越近越好。

在用Tomcat服务器发布一个由jsp，servlet等技术组成的web项目时，出现下面错误，

 

严重 [RMI TCP Connection(3)-127001] orgapachecatalinacoreContainerBaseaddChildInternal ContainerBaseaddChild: start: 
orgapachecatalinaLifecycleException: Failed to start component [StandardEngine[Catalina]StandardHost[localhost]StandardContext[]]
at orgapachecatalinautilLifecycleBasehandleSubClassException(LifecycleBasejava:441)
at orgapachecatalinautilLifecycleBasestart(LifecycleBasejava:198)
at orgapachecatalinacoreContainerBaseaddChildInternal(ContainerBasejava:740)
at orgapachecatalinacoreContainerBaseaddChild(ContainerBasejava:716)
at orgapachecatalinacoreStandardHostaddChild(StandardHostjava:703)
at orgapachecatalinastartupHostConfigmanageApp(HostConfigjava:1729)
at sunreflectNativeMethodAccessorImplinvoke0(Native Method)
at sunreflectNativeMethodAccessorImplinvoke(NativeMethodAccessorImpljava:62)
at sunreflectDelegatingMethodAccessorImplinvoke(DelegatingMethodAccessorImpljava:43)
at javalangreflectMethodinvoke(Methodjava:498)
at orgapachetomcatutilmodelerBaseModelMBeaninvoke(BaseModelMBeanjava:287)
at comsunjmxinterceptorDefaultMBeanServerInterceptorinvoke(DefaultMBeanServerInterceptorjava:819)
at comsunjmxmbeanserverJmxMBeanServerinvoke(JmxMBeanServerjava:801)
at orgapachecatalinambeansMBeanFactorycreateStandardContext(MBeanFactoryjava:456)
at orgapachecatalinambeansMBeanFactorycreateStandardContext(MBeanFactoryjava:405)
at sunreflectNativeMethodAccessorImplinvoke0(Native Method)
at sunreflectNativeMethodAccessorImplinvoke(NativeMethodAccessorImpljava:62)
at sunreflectDelegatingMethodAccessorImplinvoke(DelegatingMethodAccessorImpljava:43)
at javalangreflectMethodinvoke(Methodjava:498)
at orgapachetomcatutilmodelerBaseModelMBeaninvoke(BaseModelMBeanjava:287)
at comsunjmxinterceptorDefaultMBeanServerInterceptorinvoke(DefaultMBeanServerInterceptorjava:819)
at comsunjmxmbeanserverJmxMBeanServerinvoke(JmxMBeanServerjava:801)
at javaxmanagementremotermiRMIConnectionImpldoOperation(RMIConnectionImpljava:1468)
at javaxmanagementremotermiRMIConnectionImplaccess$300(RMIConnectionImpljava:76)
at javaxmanagementremotermiRMIConnectionImpl$PrivilegedOperationrun(RMIConnectionImpljava:1309)
at javaxmanagementremotermiRMIConnectionImpldoPrivilegedOperation(RMIConnectionImpljava:1401)
at javaxmanagementremotermiRMIConnectionImplinvoke(RMIConnectionImpljava:829)
at sunreflectNativeMethodAccessorImplinvoke0(Native Method)
at sunreflectNativeMethodAccessorImplinvoke(NativeMethodAccessorImpljava:62)
at sunreflectDelegatingMethodAccessorImplinvoke(DelegatingMethodAccessorImpljava:43)
at javalangreflectMethodinvoke(Methodjava:498)
at sunrmiserverUnicastServerRefdispatch(UnicastServerRefjava:357)
at sunrmitransportTransport$1run(Transportjava:200)
at sunrmitransportTransport$1run(Transportjava:197)
at javasecurityAccessControllerdoPrivileged(Native Method)
at sunrmitransportTransportserviceCall(Transportjava:196)
at sunrmitransporttcpTCPTransporthandleMessages(TCPTransportjava:568)
at sunrmitransporttcpTCPTransport$ConnectionHandlerrun0(TCPTransportjava:826)
at sunrmitransporttcpTCPTransport$ConnectionHandlerlambda$run$0(TCPTransportjava:683)
at javasecurityAccessControllerdoPrivileged(Native Method)
at sunrmitransporttcpTCPTransport$ConnectionHandlerrun(TCPTransportjava:682)
at javautilconcurrentThreadPoolExecutorrunWorker(ThreadPoolExecutorjava:1149)
at javautilconcurrentThreadPoolExecutor$Workerrun(ThreadPoolExecutorjava:624)
at javalangThreadrun(Threadjava:748)
Caused by: javalangIllegalArgumentException: Invalid <url-pattern> [active] in servlet mapping
at orgapachecatalinacoreStandardContextaddServletMappingDecoded(StandardContextjava:3105)
at orgapachecatalinaContextaddServletMappingDecoded(Contextjava:879)
at orgapachecatalinastartupContextConfigconfigureContext(ContextConfigjava:1386)
at orgapachecatalinastartupContextConfigwebConfig(ContextConfigjava:1197)
at orgapachecatalinastartupContextConfigconfigureStart(ContextConfigjava:775)
at orgapachecatalinastartupContextConfiglifecycleEvent(ContextConfigjava:299)
at orgapachecatalinautilLifecycleBasefireLifecycleEvent(LifecycleBasejava:123)
at orgapachecatalinacoreStandardContextstartInternal(StandardContextjava:5003)
at orgapachecatalinautilLifecycleBasestart(LifecycleBasejava:183)
42 more

 

查看上面错误提示，可以看到这么一句：Caused by: javalangIllegalArgumentException: Invalid <url-pattern> [active] in servlet mapping

于是进入 webxml文件查看配置文件的 <url-pattern>，发现文件是

<servlet-mapping>
<servlet-name>ActiveServlet</servlet-name>
<url-pattern>active</url-pattern>
</servlet-mapping>

在active前面少了一个“/”,加上/后变为

<servlet-mapping>
<servlet-name>ActiveServlet</servlet-name>
<url-pattern>/active</url-pattern>
</servlet-mapping>
重新启动Tomcat服务器，问题解决。

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