make sure there is not a copy of servlet.jar in JAVA_HOME\jre\lib\ext. Also
check in your webapp\web-inf\lib.

These would conflict with Tomcat's version.

Charlie

> -----Original Message-----
> From: Caroline Clewlow [mailto:[EMAIL PROTECTED]]
> Sent: Friday, December 21, 2001 10:18 AM
> To: Tomcat Users List
> Subject: Re: Re: HTTP error 503. Please please help !
> 
> 
> Directly from Tomcat ...... no webserver involved.  It's 
> happening with the example jsp files aswell - not my own code.
> 
> I'm assuming its some problem with servlet.jar.
> Below is a sample from my logfile.txt.  If you have time to 
> look at it you'll be able to see the exact errors I'm getting.
> 
> Thanks for all your help btw.
> 
> Caroline
> 
> _________________________-
> 
> 2001-12-21 12:50:01 StandardWrapper[:default]: Loading 
> container servlet default
> 2001-12-21 12:50:01 StandardWrapper[:invoker]: Loading 
> container servlet invoker
> 2001-12-21 12:50:01 StandardWrapper[:jsp]: Marking servlet 
> jsp as unavailable
> 2001-12-21 12:50:01 StandardContext[]: Servlet  threw load() exception
> javax.servlet.ServletException: Error instantiating servlet 
> class org.apache.jasper.servlet.JspServlet
>       at 
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardW
> rapper.java:893)
>       at 
> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.
> java:808)
>       at 
> org.apache.catalina.core.StandardContext.loadOnStartup(Standar
> dContext.java:3266)
>       at 
> org.apache.catalina.core.StandardContext.start(StandardContext
> .java:3395)
>       at 
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.
> java:785)
>       at 
> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:454)
>       at 
> org.apache.catalina.core.StandardHost.install(StandardHost.java:714)
>       at 
> org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:300)
>       at 
> org.apache.catalina.startup.HostConfig.start(HostConfig.java:389)
>       at 
> org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConf
> ig.java:232)
>       at 
> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(L
> ifecycleSupport.java:155)
>       at 
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131)
>       at 
> org.apache.catalina.core.StandardHost.start(StandardHost.java:614)
>       at 
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
>       at 
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:307)
>       at 
> org.apache.catalina.core.StandardService.start(StandardService
> .java:388)
>       at 
> org.apache.catalina.core.StandardServer.start(StandardServer.java:505)
>       at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
>       at 
> org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
>       at 
> org.apache.catalina.startup.Catalina.process(Catalina.java:179)
>       at java.lang.reflect.Method.invoke(Native Method)
>       at 
> org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
> ----- Root Cause -----
> java.lang.IncompatibleClassChangeError: Implementing class
>       at java.lang.ClassLoader.defineClass0(Native Method)
>       at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
>       at 
> java.security.SecureClassLoader.defineClass(SecureClassLoader.
> java:111)
>       at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
>       at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
>       at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>       at 
> org.apache.catalina.loader.StandardClassLoader.findClass(Stand
> ardClassLoader.java:674)
>       at 
> org.apache.catalina.loader.StandardClassLoader.loadClass(Stand
> ardClassLoader.java:1093)
>       at 
> org.apache.catalina.loader.StandardClassLoader.loadClass(Stand
> ardClassLoader.java:992)
>       at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
>       at java.lang.Class.newInstance0(Native Method)
>       at java.lang.Class.newInstance(Class.java:237)
>       at 
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardW
> rapper.java:884)
>       at 
> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.
> java:808)
>       at 
> org.apache.catalina.core.StandardContext.loadOnStartup(Standar
> dContext.java:3266)
>       at 
> org.apache.catalina.core.StandardContext.start(StandardContext
> .java:3395)
>       at 
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.
> java:785)
>       at 
> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:454)
>       at 
> org.apache.catalina.core.StandardHost.install(StandardHost.java:714)
>       at 
> org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:300)
>       at 
> org.apache.catalina.startup.HostConfig.start(HostConfig.java:389)
>       at 
> org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConf
> ig.java:232)
>       at 
> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(L
> ifecycleSupport.java:155)
>       at 
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131)
>       at 
> org.apache.catalina.core.StandardHost.start(StandardHost.java:614)
>       at 
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
>       at 
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:307)
>       at 
> org.apache.catalina.core.StandardService.start(StandardService
> .java:388)
>       at 
> org.apache.catalina.core.StandardServer.start(StandardServer.java:505)
>       at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
>       at 
> org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
>       at 
> org.apache.catalina.startup.Catalina.process(Catalina.java:179)
>       at java.lang.reflect.Method.invoke(Native Method)
>       at 
> org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
> 
> 
> 

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