RE: java.lang.NoClassDefFoundError: org/apache/cactus/ServletTestCaseMark,
Thank you for this submission. Essentially, I'd like to integrate your change and then re-run the unit tests against several containers (Tomcat, Resin, Orion, etc.) to make sure that it has no unintended consequences for the "standard" configuration. Off hand, I think your patch will make cactus configuration substantially more forgiving. I'm looking forward to using it myself :) As background to this change, interested developers should check out: http://www.javageeks.com/Papers/ClassForName/index.html (a paper by Ted Neward explaining the subtleties in the Java classloader model: a worthwhile read for anyone doing web app development). Thanks for contributing! Cheers, Nicholas Lesiecki -----Original Message----- From: Volkmann, Mark [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 21, 2002 7:12 AM To: 'Fred Loney'; '[EMAIL PROTECTED]' Subject: RE: java.lang.NoClassDefFoundError: org/apache/cactus/ServletTestCase We did resolve the problem, but the solution isn't pretty. We had to patch Cactus to get it to work. I've attached a class we added. We replaced all calls to Class.forName in the Cactus source with calls to ClassLoaderHelper.forName. This allows classes in your web app., such as your unit test code, to find classes in your server classpath, such as Cactus and Log4J classes. We think the problem has something to do with using Log4J in our application. We put log4j.jar in our server classpath and this seems to be a problem for Cactus without the patch. I've also attached our custom cactus.jar file that contains these changes. All you need to do to try it is put all the JARs cactus needs (aspectjrt.jar, cactus.jar, httpunit.jar, junit.jar and log4j.jar) in your server classpath instead of your web app. Another advantage to this approach is that you don't have to include all those JARs in every web application. That's a big plus for us because we are testing around 20 web apps. Perhaps this change should become part of the normal Cactus codebase! If this is a bad idea, I'd like to hear why. <<ClassLoaderHelper.java>> <<cactus.jar>> -----Original Message----- From: Fred Loney [SMTP:[EMAIL PROTECTED]] Sent: Wednesday, February 20, 2002 9:23 PM To: Volkmann, Mark Subject: java.lang.NoClassDefFoundError: org/apache/cactus/ServletTestCase Were you able to resolve the problem? I have the same situation and would appreciate any advice on resolution. Classloaders are truly the bane of webapp development. Thanks. ---- Mark Volkmann wrote: Here's part of the stack trace I'm getting. cactus.jar, junit.jar and aspectjrt.jar are in the WEB-INF/lib of the WAR file of my web application. They are not available through my CLASSPATH. How could it find AbstractTestCaller, but not find ServletTestCase? java.lang.NoClassDefFoundError: org/apache/cactus/ServletTestCase at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:486) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111) at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericCla ssLo ader.java:339) at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoa der. java:156) at java.lang.ClassLoader.loadClass(ClassLoader.java:297) at java.lang.ClassLoader.loadClass(ClassLoader.java:290) at java.lang.ClassLoader.loadClass(ClassLoader.java:253) at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAware Clas sLoader.java:43) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:120) at org.apache.cactus.server.AbstractTestCaller.getTestClassClass(AbstractTe stCa ller.java:326) **************************************************************************** *********** WARNING: All e-mail sent to and from this address will be received or otherwise recorded by the A.G. Edwards corporate e-mail system and is subject to archival, monitoring or review by, and/or disclosure to, someone other than the recipient. **************************************************************************** ***********
