title: java.util.concurrent.ExecutionException in tomcat7.x
body: <p>I have point tomcat code by adding following line in server.xml for tomcat5.x and it works fine.</p>
  
  <pre><code>&lt;Host name="nsncatbranch" debug="0" appBase="D:/svn/branch/rncom/modules/web/clients/web/web/operationsmanager"
                  unpackWARs="false" autoDeploy="false"&gt;
  
                  &lt;Logger className="org.apache.catalina.logger.FileLogger"
                      prefix="om_log." suffix=".log"
                      timestamp="true"/&gt;
  
          &lt;Context path="" docBase="D:/svn/branch/rncom/modules/web/clients/web/web/operationsmanager" debug="0"
                 reloadable="false" crossContext="false" /&gt;
      &lt;/Host&gt;
  </code></pre>
  
  <p>But in tomcat7.x it gives me following error.</p>
  
  <pre><code>java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].St
  andardHost[nsncatbranch].StandardContext[]]
          at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
          at java.util.concurrent.FutureTask.get(FutureTask.java:111)
          at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1130)
          at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
          at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1568)
          at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1558)
          at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
          at java.util.concurrent.FutureTask.run(FutureTask.java:166)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
          at java.lang.Thread.run(Thread.java:722)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[nsncatbranch].Stand
  ardContext[]]
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
          ... 7 more
  Caused by: java.lang.IllegalArgumentException: Servlet mapping specifies an unknown servlet name invoker
          at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3204)
          at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3183)
          at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1302)
          at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1302)
          at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:825)
          at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:300)
          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:5161)
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
          ... 7 more
  </code></pre>
  
  <p>I am not getting upper error as i have commented invoker in web.xml. I am facing new error described below.</p>
  
  <pre><code>SEVERE: Unable to determine URL for WEB-INF/classes
  javax.naming.NameNotFoundException: Resource /WEB-INF/classes not found
          at org.apache.naming.resources.BaseDirContext.listBindings(BaseDirContext.java:733)
          at org.apache.naming.resources.ProxyDirContext.listBindings(ProxyDirContext.java:546)
          at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1197)
          at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:825)
          at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:300)
          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:5161)
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
          at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:897)
          at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:873)
          at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
          at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)
          at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)
          at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
          at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
          at java.util.concurrent.FutureTask.run(FutureTask.java:166)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
          at java.lang.Thread.run(Thread.java:722)
  </code></pre>