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From "Howard Miller" ...@howardmiller.co.uk>
Subject Re: AW: Problems with Eclipse and Struts
Date Tue, 24 Dec 2002 09:41:16 GMT
Well.....

Maybe I'm just getting old, but I tend to add additional debug code into my 
applications and use a lot of log statements.

I am in the position that I sometimes (well often) have to debug client's applications 
over a Telnet connection, so I can't rely on the abilities of an IDE. I have got used to 
working in this way, although I accept that it probably isn't very efficient. You may not

have these "restrictions" of course.

HM


On 24 Dec 2002 at 10:33, Oliver Adolph wrote:

> Hi Howard,
> 
> But how do you debug your application ?
> 
> Oliver Adolph 
> 
> -----Urspr√ľngliche Nachricht-----
> Von: Howard Miller [mailto:me@howardmiller.co.uk] 
> Gesendet: Dienstag, 24. Dezember 2002 10:30
> An: Struts Users Mailing List
> Betreff: Re: Problems with Eclipse and Struts
> 
> 
> Hi,
> 
> I use much the same set up as you and had lots of problems with those
> plugins. 
> Personally I don't use them, I find it *much* easier just to keep a
> terminal/dos window 
> open and use Ant to build and test the application. The Ant build script
> that is 
> described in the Tomcat documentation (although it has a couple of
> mistakes!), gets 
> the job done.
> 
> I take the attitude that I always want to be able to modify and build my
> applications 
> from the command line if I'm stuck and can't use the IDE.
> 
> HM
> 
> On 24 Dec 2002 at 10:10, Oliver Adolph wrote:
> 
> > Hi,
> > 
> > I hope anybody can help me with this issue.
> > I have a web application, which runs under Tomcat 4.1.18. It uses Struts
> > 1.1B2. I also use Eclipse 2.0.2 with the Lomboz and the Sysdeo plugins.
> > 
> > Now I run into the following problem:
> > When I try to start Tomcat through one of the plugins to debug the 
> > application I always get the following error
> > 
> > 24.12.2002 09:57:38 org.apache.commons.digester.Digester startElement
> > SCHWERWIEGEND: Begin event threw exception
> > java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer
> > 	at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
> > 	at java.security.AccessController.doPrivileged(Native Method)
> > 	at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
> > 	at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
> > 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
> > 	at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
> > 	at 
> > org.apache.commons.digester.ObjectCreateRule.begin(ObjectCreateRule.ja
> > va:252
> > )
> > 	at
> > org.apache.commons.digester.Digester.startElement(Digester.java:1237)
> > 	at
> >
> org.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXParser.j
> > ava:459)
> > 	at
> >
> org.apache.xerces.impl.XMLNamespaceBinder.startElement(XMLNamespaceBinder.ja
> > va:572)
> > 	at
> >
> org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java
> > :727)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDo
> > cumentFragmentScannerImpl.java:759)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElem
> > entHook(XMLDocumentScannerImpl.java:957)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc
> > her.dispatch(XMLDocumentFragmentScannerImpl.java:1544)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocume
> > ntFragmentScannerImpl.java:329)
> > 	at
> >
> org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:525)
> > 	at
> >
> org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:581)
> > 	at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152)
> > 	at
> >
> org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:117
> > 5)
> > 	at org.apache.commons.digester.Digester.parse(Digester.java:1495)
> > 	at org.apache.catalina.startup.Catalina.start(Catalina.java:449)
> > 	at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
> > 	at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
> > 	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:324)
> > 	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
> > Catalina.start: java.lang.ClassNotFoundException:
> > org.apache.catalina.core.StandardServer
> > java.lang.ClassNotFoundException: org.apache.catalina.core.StandardServer
> > 	at
> >
> org.apache.commons.digester.Digester.createSAXException(Digester.java:2312)
> > 	at
> >
> org.apache.commons.digester.Digester.createSAXException(Digester.java:2332)
> > 	at
> > org.apache.commons.digester.Digester.startElement(Digester.java:1240)
> > 	at
> >
> org.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXParser.j
> > ava:459)
> > 	at
> >
> org.apache.xerces.impl.XMLNamespaceBinder.startElement(XMLNamespaceBinder.ja
> > va:572)
> > 	at
> >
> org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java
> > :727)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDo
> > cumentFragmentScannerImpl.java:759)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElem
> > entHook(XMLDocumentScannerImpl.java:957)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc
> > her.dispatch(XMLDocumentFragmentScannerImpl.java:1544)
> > 	at
> >
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocume
> > ntFragmentScannerImpl.java:329)
> > 	at
> >
> org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:525)
> > 	at
> >
> org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:581)
> > 	at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152)
> > 	at
> >
> org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:117
> > 5)
> > 	at org.apache.commons.digester.Digester.parse(Digester.java:1495)
> > 	at org.apache.catalina.startup.Catalina.start(Catalina.java:449)
> > 	at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
> > 	at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
> > 	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:324)
> > 	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > I finally found out that this problem is related to the 
> > commons-digester.jar. When I remove this jar from my project Tomcat 
> > starts. But then struts is not able to load it's config file:
> > 
> > 
> > 2002-12-24 10:07:15 StandardWrapper[/intercard:action]: Marking 
> > servlet action as unavailable 2002-12-24 10:07:15 
> > StandardContext[/intercard]: Servlet /intercard threw
> > load() exception
> > javax.servlet.ServletException: Error instantiating servlet class 
> > org.apache.struts.action.ActionServlet
> > 	at 
> > org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.j
> > ava:91
> > 1)
> > 	at
> > org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:821)
> > 	at
> >
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:
> > 3420)
> > 	at
> > org.apache.catalina.core.StandardContext.start(StandardContext.java:3608)
> > 	at
> > org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
> > 	at
> > org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
> > 	at
> > org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
> > 	at
> > org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
> > 	at
> > org.apache.catalina.core.StandardService.start(StandardService.java:497)
> > 	at
> > org.apache.catalina.core.StandardServer.start(StandardServer.java:2189)
> > 	at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
> > 	at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
> > 	at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
> > 	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:324)
> > 	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
> > ----- Root Cause -----
> > java.lang.NoClassDefFoundError: org/apache/commons/digester/RuleSet
> > 	at java.lang.Class.getDeclaredConstructors0(Native Method)
> > 	at java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
> > 	at java.lang.Class.getConstructor0(Class.java:1762)
> > 	at java.lang.Class.newInstance0(Class.java:276)
> > 	at java.lang.Class.newInstance(Class.java:259)
> > 	at
> >
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:90
> > 2)
> > 	at
> > org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:821)
> > 	at
> >
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:
> > 3420)
> > 	at
> > org.apache.catalina.core.StandardContext.start(StandardContext.java:3608)
> > 	at
> > org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
> > 	at
> > org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
> > 	at
> > org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
> > 	at
> > org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
> > 	at
> > org.apache.catalina.core.StandardService.start(StandardService.java:497)
> > 	at
> > org.apache.catalina.core.StandardServer.start(StandardServer.java:2189)
> > 	at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
> > 	at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
> > 	at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
> > 	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:324)
> > 	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > When I start Tomcat not through the plugins as a standalone 
> > application everything works fine. To me it looks like a problem of 
> > the ClassLoader because the digester is also part of Tomcat, but I'm 
> > not shure.
> > 
> > By the way with Struts 1.0 it worked without any problem.
> > 
> > 
> > Oliver Adolph
> > 
> > --
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> > For additional commands, e-mail: 
> > <mailto:struts-user-help@jakarta.apache.org>
> > 
> > 
> 
> 
> 
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> 



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