tomcat启动报了这个问题，怎么解决

Question

org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/oa]]	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:629)	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1839)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)	at java.lang.Thread.run(Thread.java:748)

Answer 1

web.xml里面有问题