title: Eclipse Tomcat Error in Mac OS X
body: <p>I'm getting the following <strong>error</strong> when I try to run <code>Tomcat</code> from my <code>Eclipse</code>. </p>
  
  <p>Till yesterday it was working fine. </p>
  
  <p>I'm a beginner, please do help me:</p>
  
  <blockquote>
    <p>SEVERE: A child container failed during start
    java.util.concurrent.ExecutionException:
    org.apache.catalina.LifecycleException: Failed to start component
    [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/LoginProject]]
      at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
      at java.util.concurrent.FutureTask.get(FutureTask.java:83)  at
    org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
      at
    org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at
    org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
      at
    org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
      at java.util.concurrent.FutureTask.run(FutureTask.java:138)     at
    java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
      at
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
      at java.lang.Thread.run(Thread.java:680) Caused by:
    org.apache.catalina.LifecycleException: Failed to start component
    [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/LoginProject]]
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      ... 7 more Caused by: java.lang.IllegalArgumentException: Servlet
    mapping specifies an unknown servlet name SaveNoticeServlet   at
    org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3219)
      at
    org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3198)
      at
    org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1366)
      at
    org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1353)
      at
    org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
      at
    org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369)
      at
    org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
      at
    org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
      at
    org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5269)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more Jul 25, 2013 2:42:18 PM
    org.apache.catalina.core.ContainerBase startInternal SEVERE: A child
    container failed during start java.util.concurrent.ExecutionException:
    org.apache.catalina.LifecycleException: Failed to start component
    [StandardEngine[Catalina].StandardHost[localhost]]    at
    java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)    at
    java.util.concurrent.FutureTask.get(FutureTask.java:83)   at
    org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
      at
    org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at
    org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at
    org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:684)    at
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)   at
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)     at
    org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)   at
    org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456) Caused
    by: org.apache.catalina.LifecycleException: Failed to start component
    [StandardEngine[Catalina].StandardHost[localhost]]    at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at
    org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
      at
    org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
      at java.util.concurrent.FutureTask.run(FutureTask.java:138)     at
    java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
      at
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
      at java.lang.Thread.run(Thread.java:680) Caused by:
    org.apache.catalina.LifecycleException: A child container failed
    during start  at
    org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
      at
    org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more Jul 25, 2013 2:42:18 PM
    org.apache.catalina.startup.Catalina start SEVERE: Catalina.start: 
    org.apache.catalina.LifecycleException: Failed to start component
    [StandardServer[8005]]    at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:684)    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:322)   at
    org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456) Caused
    by: org.apache.catalina.LifecycleException: Failed to start component
    [StandardService[Catalina]]   at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at
    org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more Caused by: org.apache.catalina.LifecycleException: Failed
    to start component [StandardEngine[Catalina]]     at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at
    org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 9 more Caused by: org.apache.catalina.LifecycleException: A child
    container failed during start     at
    org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
      at
    org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
      at
    org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 11 more Jul 25, 2013 2:42:18 PM
    org.apache.catalina.startup.Catalina start INFO: Server startup in 593
    ms</p>
  </blockquote>