Javier wrote:

I tried to run my first servlet and got this error:




Hi Javier,

<snip trace>

root cause

java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet
        java.lang.ClassLoader.defineClass0(Native Method)
        java.lang.ClassLoader.defineClass(Unknown Source)
        java.security.SecureClassLoader.defineClass(Unknown Source)
        java.net.URLClassLoader.defineClass(Unknown Source)
        java.net.URLClassLoader.access$100(Unknown Source)
        java.net.URLClassLoader$1.run(Unknown Source)
        java.security.AccessController.doPrivileged(Native Method)
        java.net.URLClassLoader.findClass(Unknown Source)
        java.lang.ClassLoader.loadClass(Unknown Source)
        java.lang.ClassLoader.loadClass(Unknown Source)
        sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        java.lang.ClassLoader.loadClass(Unknown Source)
        org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.ja
va:1278)
        org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.ja
va:1212)
        java.lang.ClassLoader.loadClassInternal(Unknown Source)
        java.lang.ClassLoader.defineClass0(Native Method)
        java.lang.ClassLoader.defineClass(Unknown Source)
        java.security.SecureClassLoader.defineClass(Unknown Source)
        org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassL
oader.java:1652)
        org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.ja
va:883)
        org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.ja
va:1332)
        org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.ja
va:1212)
        org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:16
4)
        org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:578)
        org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:209)
        org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
        org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConn
ection(Http11Protocol.java:549)
        org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
        org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.ja
va:666)
        java.lang.Thread.run(Unknown Source)



humm sounds strange....what is the exact version of tomcat you use ?
have you changed something in the scripts launching tomcat ?
did you change packaging of tomcat ? or removed any library ? (.jar files)

Jerome



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