LinkageError on integratedWLS with prefer-web-inf-classes

Hello.
I'm currently messing with some reporting tool (BIRT) for weblogic. There's a web application example which should be deployed on application server for demonstration.
I have no problems deploying it on standalone WebLogic on linux server (jrockit), but I can't run it on my local integratedWLS (hotspot) - there is LinkageError.
Stalking through Interment, I found out that this thing has an issue with WebLogic. The application uses a lot of libraries and some of them are included in WebLogic but with lower versions, so there is jar collisions.
To solve this issue there is weblogic.xml with:
<container-descriptor>
<prefer-web-inf-classes>true</prefer-web-inf-classes>
</container-descriptor>
As I said, with this file I can deploy the application on standalone WLS and it works normally but deploying on integratedWLS fails with LinkageError.
If I remove weblogic.xml, deployment doesn't fail, but the application throws exceptions on runtime because of wrong jar versions (that is understandable).
Why can't I run the application on integratedWLS with prefer-web-inf-classes?
Thanks.
JDev 11.1.2.3, WLS 10.3.5
LinkageError:
[05:51:50 PM] Redeploying Application...
<21.10.2013 17:51:52 GST> <Warning> <HTTP> <BEA-101162> <User defined listener org.eclipse.birt.report.listener.ViewerServletContextListener failed: java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.ElementImpl.getSchemaTypeInfo()Lorg/w3c/dom/TypeInfo;" the class loader (instance of weblogic/utils/classloaders/ChangeAwareClassLoader) of the current class, org/apache/xerces/dom/ElementImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Element have different Class objects for the type org/w3c/dom/TypeInfo used in the signature.
java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.ElementImpl.getSchemaTypeInfo()Lorg/w3c/dom/TypeInfo;" the class loader (instance of weblogic/utils/classloaders/ChangeAwareClassLoader) of the current class, org/apache/xerces/dom/ElementImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Element have different Class objects for the type org/w3c/dom/TypeInfo used in the signature
at org.apache.xerces.dom.DeferredDocumentImpl.getNodeObject(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.synchronizeChildren(Unknown Source)
at org.apache.xerces.dom.CoreDocumentImpl.getDocumentElement(Unknown Source)
at org.eclipse.birt.core.framework.jar.BundleLoader.loadExtensions(BundleLoader.java:151)
at org.eclipse.birt.core.framework.jar.BundleLoader.load(BundleLoader.java:63)
Truncated. see log file for complete stacktrace
>
<21.10.2013 17:51:52 GST> <Error> <Deployer> <BEA-149265> <Failure occurred in the execution of deployment request with ID '1382363510965' for task '7'. Error is: 'weblogic.application.ModuleException: '
weblogic.application.ModuleException:
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1510)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:482)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119)
Truncated. see log file for complete stacktrace
Caused By: java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.ElementImpl.getSchemaTypeInfo()Lorg/w3c/dom/TypeInfo;" the class loader (instance of weblogic/utils/classloaders/ChangeAwareClassLoader) of the current class, org/apache/xerces/dom/ElementImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Element have different Class objects for the type org/w3c/dom/TypeInfo used in the signature
at org.apache.xerces.dom.DeferredDocumentImpl.getNodeObject(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.synchronizeChildren(Unknown Source)
at org.apache.xerces.dom.CoreDocumentImpl.getDocumentElement(Unknown Source)
at org.eclipse.birt.core.framework.jar.BundleLoader.loadExtensions(BundleLoader.java:151)
at org.eclipse.birt.core.framework.jar.BundleLoader.load(BundleLoader.java:63)
Truncated. see log file for complete stacktrace
>
<21.10.2013 17:51:52 GST> <Error> <Deployer> <BEA-149202> <Encountered an exception while attempting to commit the 9 task for the application 'WebViewerWeblogic'.>
<21.10.2013 17:51:52 GST> <Warning> <Deployer> <BEA-149004> <Failures were detected while initiating deploy task for application 'WebViewerWeblogic'.>
<21.10.2013 17:51:52 GST> <Warning> <Deployer> <BEA-149078> <Stack trace for message 149004
weblogic.application.ModuleException:
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1510)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:482)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119)
Truncated. see log file for complete stacktrace
Caused By: java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.ElementImpl.getSchemaTypeInfo()Lorg/w3c/dom/TypeInfo;" the class loader (instance of weblogic/utils/classloaders/ChangeAwareClassLoader) of the current class, org/apache/xerces/dom/ElementImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Element have different Class objects for the type org/w3c/dom/TypeInfo used in the signature
at org.apache.xerces.dom.DeferredDocumentImpl.getNodeObject(Unknown Source)
at org.apache.xerces.dom.DeferredDocumentImpl.synchronizeChildren(Unknown Source)
at org.apache.xerces.dom.CoreDocumentImpl.getDocumentElement(Unknown Source)
at org.eclipse.birt.core.framework.jar.BundleLoader.loadExtensions(BundleLoader.java:151)
at org.eclipse.birt.core.framework.jar.BundleLoader.load(BundleLoader.java:63)
Truncated. see log file for complete stacktrace
>
[05:51:52 PM] Deployment cancelled.
[05:51:52 PM] ---- Deployment incomplete ----.
[05:51:52 PM] Remote deployment failed (oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer)
#### Cannot run application WebViewerWeblogic due to error deploying to IntegratedWebLogicServer.

User defined listener org.eclipse.birt.report.listener.ViewerServletContextListener failed: java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.ElementImpl.getSchemaTypeInfo()Lorg/w3c/dom/TypeInfo
Bug
User defined listener org.eclipse.birt.report.listener.ViewerServletContextListener failed: java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.ElementImpl.getSchemaType
Info()Lorg/w3c/dom/TypeInfo
https://bugs.eclipse.org/bugs/show_bug.cgi?id=383926

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          >
          > src -
          > - com
          > - edeploy
          > - subdirs ... (many directories here)
          > - jsp
          > -subdirs ... (many directories here)
          >
          >
          > In com.edeploy.subdirs, there exists *.java files, and *.gxq files (query
          > files). I would like to modify my build.cmd script to copy the *.gxq
          files
          > into the same directory as the class files.
          >
          > Here's my script so far:
          >
          > @REM Create list of files to compile
          > DIR /S /B /A:-D src\com\*.java >class.list
          >
          > @REM Create list of query files
          > DIR /S /B /A:-D src\com\*.gxq >query.list
          >
          > @REM Compile
          > javac -d stage\WEB-INF\classes @class.list
          >
          > @REM Copy query files into class directory
          > .......... code needed here ......
          >
          > Can anyone help me with this?
          >
          > Thanks,
          >
          > Matt
          >
          >

Class not found in web-inf/classes folder of war file within ear file

Hi all,
          I am using Weblogic 8.1 sp4. I have a war file within an ear file. I am trying to deploy the war file with a few classes within its web-inf/classes folder, however when the classes are in that folder I consistently get a class not found exception when trying to instantiate them. If I package the classes in a jar file and then put that jar file within the web-inf/lib folder of the war, the classes are also not found.
          If I put these two classes in the app-inf/classes folder of the ear file, everything works as expected and the classes are found.
          Any ideas of why this is happening. This seems to be a very simple thing that should work, but appears to not be working at all.
          thanks in advance for any suggestions or ideas.

Hi,
          This is a known limitation/issue with WL. There is also no way around this.
          Regards,
          LG

WorkShop 3.2.0 - WEB-INF/classes not included in war file

I've created the "Faces Example" project in Workshop Studio 3.2.0 and it's running fine. However, when I export the war file to run it on another server the class files located at "WEB-INF/classes" are not included with the war.
Any suggestions on what I may be doing wrong would be greatly appreciated.
thks!

Unfortunately no, the issue with output folder being ignored occurs only with example apps bundled with Workshop product.
You can try the following workaround:
- In Workshop, Project > Properties - Java Build Path, switch to Source tab - "Remove the source folder listing" - Click OK and dismiss Properties window.
- Project > Properties - Java Build Path > Source Tab, add the same source folder entry - Click OK
- Export as WAR
With this you should see the class files bundled under output directory structure (Ex: WEB-INF/classes).

Project librarys not included in WAR file with deployment (WEB-INF/lib)

Using JDeveloper 9.0.5.2
Project Libraries are not included in WEB-INF/lib when deploying. Although the files are selected in the deployment file at 'Contributors'. Within the 'filter' the .jar files are missing.
To solve it i have to register again (i have already made the librarys project library's) the files within Tools->ManageLibrarys as user library's.
The other workaround is to make the library's System Library's within the project.
In my opinion it is a bug that you must include the project librarys as user librarys within the 'LibraryManager'

Unfortunately no, the issue with output folder being ignored occurs only with example apps bundled with Workshop product.
You can try the following workaround:
- In Workshop, Project > Properties - Java Build Path, switch to Source tab - "Remove the source folder listing" - Click OK and dismiss Properties window.
- Project > Properties - Java Build Path > Source Tab, add the same source folder entry - Click OK
- Export as WAR
With this you should see the class files bundled under output directory structure (Ex: WEB-INF/classes).

Accessing classes in web-inf/classes within JSP

hi,
i know this is probably a very basic question..or nobody would ever do something like this..but I'mn curious:
i have a class Car.class in the WEB-INF/classes directory and I want to access it from withing JSP : <% Car c = new Car(); %>
the problem is that the server tries to load the class from the package : org.apache.jsp.Car ! when putting car into an own package like my.Car then it works.. but how do i get it working without putting it into a separate package?!
thx

You could try packaging it in a jar, and placing the jar in WEB-INF/lib... I have no idea if that will help, but when you're debugging, you have to be willing to try anything.. :)

WEB-INF/classes not searched?

I am developing an Struts application.
During development I just want to have my Actions and all other files in the projects package strukture, so I compile the classes to the WEB-INF/classes directory and ends up with a structure like
WEB-INF/classes/dk.acompagny.anapplication.viewcontroller.MyAction.class.
I find the compiled class in the directory structure but OC4J does not find it. Instead I get a runtime error like:
SEVERE: No action instance for path /login could be created
oracle.classloader.util.AnnotatedClassNotFoundException:
     Missing class: dk.bladkompagniet.plus100.viewcontroler.LoginAction
     Dependent class: org.apache.struts.util.RequestUtils
     Loader: current-workspace-app.web.Bladkompagniet-Plus100-webapp:0.0.0
     Code-Source: /home/fgjensen/Work/Src/Bladkompagniet/Plus100/public_html/WEB-INF/lib/struts.jar
     Configuration: WEB-INF/lib/ directory in /home/fgjensen/Work/Src/Bladkompagniet/Plus100/public_html/WEB-INF/lib
This load was initiated at current-workspace-app.web.Bladkompagniet-Plus100-webapp:0.0.0 using the loadClass() method.
JDev lists the path it searches an the WEB-INF/classes directory is not listed. However, it finds my jsp pages and the default behavior of OC4J should be to search the WEB-INF/classes path.
Am I missing some configuration set?
Regards Flemming

Forget it, I found the error: I have to learn to spell!

JARs in WEB-INF/classes on the classpath? [NEWBIE]

Hello,
I am under the impression that any files (including JARs and all within
them) are on the classpath if they are in the folder WEB-INF/classes.
I have a WAR file that contains a JAR file that in the WEB-INF/classes
folder. The JAR file contains a class under the package structure
"mvc.users.Members". I know its there as I checked the WAR file structure
before deploying.
In the WAR file I have a Struts RegisterAction class in the package/folder
"mvc.registration.RegisterAction" which has the following code to create a
Member object:
Member member = new Member();The Member class is imported into RegisterAction using
import mvc.users.Members;and JBuilder appears to recognise Members as on the classpath and compiles
with no errors.
My problem is after I have deployed the WAR file, submitting a form to the
RegisterAction gets the error below:
javax.servlet.ServletException: Servlet execution threw an exception:
root cause:
    java.lang.NoClassDefFoundError: mvc/users/Member
        mvc.registration.RegisterAction.execute(RegisterAction.java:22)
        org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
        org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
        org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
        org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:856)If the class "mvc.users.Member" is in the JAR file in the WEB-INF/classes
folder and the "mvc.registration.RegisterAction" class in the WAR file
does (according to JBuilder) see the "mvc.users.Member" class on the
classpath and compiles... why then do I get this error?
Thanks for your help.
A Desperate Newbie,
Mark

I answered this in the JSP forum - you need to put JAR files in WEB-INF/lib.

WAR file fails to deploy WEB-INF/classes

Hi All
I am attempting to get a simple JPA on JSE app running on WLS 9.1. I can deploy my WAR file and access the jsps no problem, however the WEB-INF/classes directory is empty on deployment. How can I tell if the classes are being deployed correctly? I have tried using autodeploy and console deployment, always with the same result. My war file is structured as follows:
WEB-INF/
WEB-INF/faces-config.xml
WEB-INF/weblogic.xml
WEB-INF/web.xml
WEB-INF/classes/
WEB-INF/classes/my/test/package/{all classes}
WEB-INF/lib/{all reqd libs}
index.jsp
When I run the jsp, there are no errors, the classes just don't appear to be doing anything. The logs have absolutely nothing to help with this, I turned on app logging in weblogic.xml and it has nothing other than the initialization in it either.
I've deployed and run the exact same app (less the weblogic.xml file) successfully on Tomcat and OC4J, any ideas out there? Am I looking in the right place for the deployed class files (Checking the WL_HOME/samples\domains\wl_server\servers\examplesServer\tmp\_WL_user\jpa-example\xb6q08)?

Hi,
I've faced the same issue in WLS9.2, and but it didn't affect my web application running, I guess that the classes are read from the WAR file directly, so for me to overcome this issue, I've changed the technique of how to install web application by selecting extracted war installation instead, and from the WLS Console selected
"I will make the deployment accessible from the following location" and selected the folder that contains the extracted WAR.
Hope this will help,
Issa

LinkageError on integratedWLS with prefer-web-inf-classes

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