title: java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet google app engine
body: <p>I'm trying to set up an application for Google app engine, and I cannot make it work. I'm have everything set up with maven but spring its not working.</p>
  
  <p>I've been trough a lot of configuration setting and I cannot get it done!!</p>
  
  <p>Here you have the stack trace:</p>
  
  <pre><code>05-oct-2010 0:56:54 com.google.appengine.tools.info.RemoteVersionFactory getVersion
  INFO: Unable to access https://appengine.google.com/api/updatecheck?runtime=java&amp;release=1.3.7&amp;timestamp=1282754401&amp;api_versions=['1.0']
  java.net.UnknownHostException: appengine.google.com
      at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
      at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
      at java.net.Socket.connect(Socket.java:529)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:550)
      at com.sun.net.ssl.internal.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:141)
      at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
      at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
      at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
      at sun.net.www.protocol.https.HttpsClient.&lt;init&gt;(HttpsClient.java:272)
      at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:329)
      at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:172)
      at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:801)
      at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:158)
      at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1049)
      at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:234)
      at java.net.URL.openStream(URL.java:1010)
      at com.google.appengine.tools.info.RemoteVersionFactory.getVersion(RemoteVersionFactory.java:76)
      at com.google.appengine.tools.info.UpdateCheck.checkForUpdates(UpdateCheck.java:99)
      at com.google.appengine.tools.info.UpdateCheck.doNagScreen(UpdateCheck.java:174)
      at com.google.appengine.tools.info.UpdateCheck.maybePrintNagScreen(UpdateCheck.java:142)
      at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:150)
      at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
      at com.google.appengine.tools.development.DevAppServerMain.&lt;init&gt;(DevAppServerMain.java:113)
      at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)
  05-oct-2010 0:56:55 com.google.apphosting.utils.jetty.JettyLogger info
  INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
  05-oct-2010 0:56:55 com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
  INFO: Successfully processed E:\development\Tune My Party\src\main\webapp\WEB-INF/appengine-web.xml
  05-oct-2010 0:56:55 com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
  INFO: Successfully processed E:\development\Tune My Party\src\main\webapp\WEB-INF/web.xml
  05-oct-2010 3:56:55 com.google.apphosting.utils.jetty.JettyLogger info
  INFO: jetty-6.1.x
  05-oct-2010 3:56:57 com.google.apphosting.utils.jetty.JettyLogger warn
  ADVERTENCIA: EXCEPTION 
  java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
      at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
      at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:151)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
      at org.mortbay.util.Loader.loadClass(Loader.java:91)
      at org.mortbay.util.Loader.loadClass(Loader.java:71)
      at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73)
      at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
      at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
      at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
      at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
      at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
      at org.mortbay.jetty.Server.doStart(Server.java:224)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:185)
      at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:147)
      at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:219)
      at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:164)
      at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
      at com.google.appengine.tools.development.DevAppServerMain.&lt;init&gt;(DevAppServerMain.java:113)
      at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)
  05-oct-2010 3:56:57 com.google.appengine.tools.development.ApiProxyLocalImpl log
  GRAVE: [1286251017245000] javax.servlet.ServletContext log: unavailable
  javax.servlet.UnavailableException: org.springframework.web.servlet.DispatcherServlet
      at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
      at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
      at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
      at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
      at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
      at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
      at org.mortbay.jetty.Server.doStart(Server.java:224)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:185)
      at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:147)
      at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:219)
      at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:164)
      at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
      at com.google.appengine.tools.development.DevAppServerMain.&lt;init&gt;(DevAppServerMain.java:113)
      at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)
  
  05-oct-2010 3:56:57 com.google.apphosting.utils.jetty.JettyLogger warn
  ADVERTENCIA: failed dispatcher: java.lang.NullPointerException
  05-oct-2010 3:56:57 com.google.apphosting.utils.jetty.JettyLogger warn
  ADVERTENCIA: Failed startup of context com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@24988707{/,E:\development\Tune My Party\src\main\webapp}
  java.lang.NullPointerException
      at java.lang.Class.isAssignableFrom(Native Method)
      at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
      at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
      at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
      at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
      at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
      at org.mortbay.jetty.Server.doStart(Server.java:224)
      at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
      at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:185)
      at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:147)
      at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:219)
      at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:164)
      at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
      at com.google.appengine.tools.development.DevAppServerMain.&lt;init&gt;(DevAppServerMain.java:113)
      at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)
  05-oct-2010 3:56:57 com.google.apphosting.utils.jetty.JettyLogger info
  INFO: Started SelectChannelConnector@127.0.0.1:8888
  05-oct-2010 3:56:57 com.google.appengine.tools.development.DevAppServerImpl start
  INFO: The server is running at http://localhost:8888/
  </code></pre>
  
  <p>If someone could give me an idea it will be great!!</p>
  
  <p>Thanks!!</p>