500 Internal Server Error Java.lang.noclassdeffounderror
CommunityOracle User Group CommunityTopliners CommunityOTN Speaker BureauJava CommunityError: You don't have JavaScript enabled. This tool uses JavaScript and much of it will not work correctly without it enabled. Please turn JavaScript back on and reload this page. Please enter a title. You can not post a blank message. Please type your message and try again. More discussions in OA Framework All PlacesOracle ApplicationsE-Business SuiteE-Business Suite TechnologyOA Framework This discussion is archived 12 Replies Latest reply on Jun 25, 2009 1:24 PM by 433324 Thread: 500 Internal Server Error: java.lang.NoClassDefFoundError 547022 May 18, 2009 4:12 PM Holla from Thailand, I've developed my customised page via JDev10g (10.1.3.3.0) and found the following error when test running the developed page for the 2nd time. It means that it worked fine for the 1st time running (page I developed shown as normal). And when I tried to test run the page for the 2nd, the error occured (same session I've tried to stop OC4J before running the 2nd time). Please help me resolve this error as I'm a newbie to JDev. Thank you on advance to everyone. Here's the Error: 500 Internal Server Error java.lang.NoClassDefFoundError at oracle.apps.fnd.common.WebRequestUtil.validateContextPrivate(WebRequestUtil.java:431) at oracle.apps.fnd.common.WebRequestUtil.validateContext(WebRequestUtil.java:324) at oracle.apps.fnd.common.WebRequestUtil.validateContext(WebRequestUtil.java:227) at OAErrorPage.jspService(_OAErrorPage.java:62) [OAErrorPage.jsp] at com.orionserverhttp://Oracle Containers for J2EE 10g (10.1.3.3.0) .http.OrionHttpJspPage.service(OrionHttpJspPage.java:59) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.evermindhttp://Oracle Containers for J2EE 10g (10.1.3.3.0).server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:713) at com.evermindhttp://Oracle Containers for J2EE 10g (10.1.3.3.0).server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370) at com.evermindhttp://Oracle Containers for J2EE 10g (10.1.3.3.0).server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:259) at com.evermindhttp://Oracle Containers for J2EE 10g (10.1.3.3.0) .server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:51) at com.evermindhttp://Oracle Containers
java.lang.NoClassDefFoundError: How to resolve - Part 1 6/08/2012 Pierre-Hugues Charbonneau 48 comments Exception in thread "main" java.lang.NoClassDefFoundError is one of the most common and difficult problems that you can face when developing Java EE enterprise or standalone Java applications. The complexity of the root cause analysis and resolution process will depend of the size of your Java EE middleware environment, especially given the high number of class loaders present across the various Java EE applications. What I'm proposing to you is a series of articles which will provide you with a step by step https://community.oracle.com/thread/903484 approach on how to troubleshoot and resolve such problem. I will also share the most common Java NoClassDefFoundError problem patterns I have observed over the last 10 years. Sample Java programs will also be available in order to simplify your learning process. I also encourage you to post comments, share your problem case and ask me any question on this subject. The part 1 of the series http://javaeesupportpatterns.blogspot.com/2012/06/javalangnoclassdeffounderror-how-to.html will focus on a high level overview of this Java runtime error along with a Java ClassLoader overview. java.lang.NoClassDefFoundError - what is it? ** Tutorial video is now available:http://www.youtube.com/watch?v=Nn_Pq8cWiBg Now let's begin what a simple overview of this problem. This runtime error is thrown by the JVM when there is an attempt by a ClassLoader to load the definition of a Class (Class referenced in your application code etc.) and when such Class definition could not be found within the current ClassLoader tree. Basically, this means that such Class definition was found at compiled time but is not found at runtime. Simple enough, what about adding the missing Class to the classpath? Well not so fast, this type of problem is not that simple to fix. Adding the missing Class / JAR to your runtime application classpath / ClassLoader is just one of the many possible solutions. The key is to perform proper root cause analysis first. This is exactly why I'm creating this whole series. For now, just keep in mind that this error does not necessarily mean that you are missing this Class definition from your "expected" classpath or ClassLoder so please do not assume anything
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What I’m proposing to you is a series of articles which will provide you with a step by step approach on how to troubleshoot and resolve such problem. I will also share the most common Java NoClassDefFoundError problem patterns I have observed over the last 10 years. Sample Java programs will also be available in order to simplify your learning process. I also encourage you to post comments, share your problem case and ask me any question on this subject. The part 1 of the series will focus on a high level overview of this JavaUnanswered Topics Wrox Programmer Forums > Java > Java and JDK > Servlets Error 500 -- Internal Server Error User Name Remember Me? Password Reminder Password Register Register | FAQ | Members List | Calendar | Today's Posts | Search Search Forums Show Threads Show Posts Advanced Search Find All Thanked Posts Go to Page... Welcome to the p2p.wrox.com Forums. You are currently viewing the Servlets section of the Wrox Programmer to Programmer discussions. This is a community of tens of thousands of software programmers and website developers including Wrox book authors and readers. As a guest, you can read any forum posting. By joining today you can post your own programming questions, respond to other developers’ questions, and eliminate the ads that are displayed to guests. Registration is fast, simple and absolutely free . Thread Tools Display Modes #1 (permalink) January 24th, 2007, 06:45 AM Vijay Kumar Registered User Join Date: Jan 2007 Location: Bangalore, Karnataka, India. Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Error 500 -- Internal Server Error Error 500 -- Internal Server Error java.lang.NoClassDefFoundError: java/lang/StringBuilder at vijay.servlets.Login.doGet(Login.java:35) at javax.servlet.http.HttpServlet.service(HttpServlet .java:740) at javax.servlet.http.HttpServlet.service(HttpServlet .java:853) at weblogic.servlet.internal.ServletStubImpl$ServletI nvocationAction.run(ServletStubImpl.java:1006) at weblogic.servlet.internal.ServletStubImpl.invokeSe rvlet(ServletStubImpl.java:419) at weblogic.servlet.internal.ServletStubImpl.invokeSe rvlet(ServletStubImpl.java:315) at weblogic.servlet.internal.WebAppServletContext$Ser vletInvocationAction.run(WebAppServletContext.java :6718) at weblogic.security.acl.internal.AuthenticatedSubjec t.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(Se curityManager.java:121) at weblogic.servlet.internal.WebAppServletContext.inv okeServlet(WebAppServletConte