Error Message - java.lang.LinkageError: loader constraint violation

Hi
I get the following errormessage if I try to apply a more recent build of the JPA Toplink Essentials.
If I use the glassfish-persistence-installer-v2-b45.jar all things work fine, but if a try to upgrade my program will fail. I tried the glassfish-persistence-installer-v2-b54.jar, all also tried all builds between?!
I have no idea how I may resolve the problem?!
Any ideas?
Thanks
Marcel
(I am using Java 6, Netbeans 5.5)
Exception in thread "AWT-EventQueue-0" java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "DatenStruktur.ConditionBasic.getCouplingElement()LDatenStruktur/CouplingElement;" the class loader (instance of oracle/toplink/essentials/internal/ejb/cmp3/JavaSECMPInitializer$TempEntityLoader) of the current class, DatenStruktur/ConditionBasic, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for interface DatenStruktur/Conditionable have different Class objects for the type DatenStruktur/CouplingElement used in the signature
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2291)
at java.lang.Class.getDeclaredFields(Class.java:1743)
at oracle.toplink.essentials.internal.security.PrivilegedAccessHelper.getDeclaredFields(PrivilegedAccessHelper.java:204)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataHelper.getFields(MetadataHelper.java:443)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataDescriptor.usesPropertyAccess(MetadataDescriptor.java:1081)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ClassAccessor.processAccessors(ClassAccessor.java:564)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ClassAccessor.process(ClassAccessor.java:498)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.MetadataAccessor.processAccessor(MetadataAccessor.java:514)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ClassAccessor.processTableAndInheritance(ClassAccessor.java:1388)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ClassAccessor.process(ClassAccessor.java:484)
at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor.processAnnotations(MetadataProcessor.java:240)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:370)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:600)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.callPredeploy(JavaSECMPInitializer.java:169)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:237)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:253)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:140)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java):96)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java):73)
at MainProgramManagement.ProgramMain.getEntityManagerFactory(ProgramMain.java:347)
at MainProgramManagement.ProgramMain.persistData(ProgramMain.java:788)

upgrade to cf8, which supports jdk 1.6.
mx7 does not support 1.5 or 1.6
Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com/

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Hello,
Could this be related to the bug described at:
https://glassfish.dev.java.net/issues/show_bug.cgi?id=2625
If you have an interface involved, try adding them to the persistence.xml's list of classes.
Best Regards,
Chris

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at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:344)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:301)
Does that mean some libraries loaded multiple times? How do I fix this? Thanks!
cheney

If you are putting part of your application in the shared library then please make sure that it should not import any of the classes which are there in other 2 war or jar files which are loaded separately.
So organize your classes in that way.

Java.lang.LinkageError in weblogic 10.3

i had deployed the jasperserver.war in weblogic 10.3 server...
i am getting the following exception...
Context Initialization failed
org.springframework.beans.factory.BeanDefinationStroreException:unexpected exception parsing xml document from ServletCotext resource[WEB-INF/applicationContext.xml]nested exception is java.lang.LinkageError:loader constraint voilation when resolving the method javax.xml.parser.DocumentBuilder.setEntityResolver(Lorg/xml/sax/EntityResolver:)V"the class loader intance of weblogic/utils/classloaders/ChangeAwareClassLoader) of the current class,og/springframework/factory/xm/DefaultDocumentLoader and the classloader<instance of <bootloader>) for resolved classes javax/xml/parsers/DocumentBuiler have different class objects for the type org/xml/sax/EntityResolver used in the signature
please help me out ...
thanks in advance
venkat seerla

I think there is conflict with a class in the system classloader an one into jasperserver.war. Maybe It is due to a diferent implementation of Spring framework of WebLogic and jasper reports. Check if jasper spring version matches weblogic spring version.
To understand classloading visit http://download.oracle.com/docs/cd/E17904_01/web.1111/e13706/classloading.htm

Java.lang.LinkageError: duplicate class definition

Dear Experts,
We are in the process of Migrating current Mi2.5 application to NWM7.1.
We have that 2.5 application properly running in production system but in 7.1 while opening some JSP page of application
it sometimes opens properly & sometimes gives this error..
java.lang.LinkageError: duplicate class definition
The detailed error description is as given below..
Pls advice..

Error: 500
Location: /ZEFL_BP_MI/jsp/stock/bp_technicians_issue_sparesforms.jsp
Internal Servlet Error:
java.lang.LinkageError: duplicate class definition: com/sap/BP/bean/TableViewBean
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at org.apache.tomcat.loader.AdaptiveClassLoader.doDefineClass(AdaptiveClassLoader.java:575)
at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.java:542)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.beans.Beans.instantiate(Unknown Source)
at java.beans.Beans.instantiate(Unknown Source)
at jsp.stock.bp_0005ftechnicians_0005fissue_0005fsparesforms._jspService(bp_0005ftechnicians_0005fissue_0005fsparesforms.java:101)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.facade.RequestDispatcherImpl.doForward(RequestDispatcherImpl.java:222)
at org.apache.tomcat.facade.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:162)
at com.sap.ip.me.api.runtime.jsp.AbstractMEHttpServlet.dispatchRequest(AbstractMEHttpServlet.java:780)
at com.sap.ip.me.api.runtime.jsp.AbstractMEHttpServlet.doGetThreadSafe(AbstractMEHttpServlet.java:281)
at com.sap.ip.me.api.runtime.jsp.AbstractMEHttpServlet.doGet(AbstractMEHttpServlet.java:552)
at com.sap.ip.me.api.runtime.jsp.AbstractMEHttpServlet.service(AbstractMEHttpServlet.java:190)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Unknown Source)
Regards,
Saptak

Windows Vista "java.lang.ClassNotFoundException: loader.class" error.

Hello,
Whenever I try to visit websites that have a java applet I get a dialogue with the following error:
java.lang.ClassNotFoundException: loader.class.
I have tried uninstalling/reinstalling java, and also adding the -xmx and -xms parameters for java applet runtime setting in control panel with various values from 128m to 1g.
The applet at http://www.java.com/en/download/installed.jsp?detect=jre&try=1 does work and reports "CONGRATULATIONS, you have the Latest version of Java!", "Java Runtime Version 1.6.0."
I have been experiencing this problem ever since I installed Windows Vista Home Premium a day or two ago. Any help is appreciated.
Regards
Greg
=====================================
Full output from Java Console
=====================================
Java Plug-in 1.6.0
Using JRE version 1.6.0 Java HotSpot(TM) Client VM
User home directory = C:\Users\Greg Taylor
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class loader.class not found.
java.lang.ClassNotFoundException: loader.class
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
     at sun.applet.AppletClassLoader.getBytes(Unknown Source)
     at sun.applet.AppletClassLoader.access$100(Unknown Source)
     at sun.applet.AppletClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 10 more
java.lang.ClassNotFoundException: loader.class
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
     at sun.applet.AppletClassLoader.getBytes(Unknown Source)
     at sun.applet.AppletClassLoader.access$100(Unknown Source)
     at sun.applet.AppletClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 10 more

ive been having the same problems, if youve resolved this problem, please tell me.
all help is appreciated

(error code = 200; message="Java error"; exception = [java.lang.Exception])

Hi, I have several times tried to install ABAP Trial, but failed.
So I need your help.
As soon as I set up XP, I download and install the newest Java, then started installation of ABAP Trial.
But at the end I just get an error message as belows.
I hope you will guide me correct direction.
Thanks for reading & Have a good day!
(Jul 11, 2008 7:38:06 AM), Install, com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles, err, An error occurred and product installation failed. Look at the log file C:\SAP\NSP\log.txt for details.
(Jul 11, 2008 7:38:06 AM), Install, com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles, err, ProductException: (error code = 200; message="Java error"; exception = [java.lang.Exception])
STACK_TRACE: 15
ProductException: (error code = 200; message="Java error"; exception = [java.lang.Exception])
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.execute(StepWrapperInstallFiles.java:254)
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.executeAllSteps(StepWrapperInstallFiles.java:224)
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.executeAllInstallationSteps(StepWrapperInstallFiles.java:177)
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.install(StepWrapperInstallFiles.java:268)
     at com.installshield.product.service.product.PureJavaProductServiceImpl.installProductAction(Unknown Source)
     at com.installshield.product.service.product.PureJavaProductServiceImpl$InstallProduct.getResultForProductAction(Unknown Source)
     at com.installshield.product.service.product.InstallableObjectVisitor.visitComponent(Unknown Source)
     at com.installshield.product.service.product.InstallableObjectVisitor.visitInstallableComponents(Unknown Source)
     at com.installshield.product.service.product.InstallableObjectVisitor.visitProductBeans(Unknown Source)
     at com.installshield.product.service.product.PureJavaProductServiceImpl$InstallProduct.install(Unknown Source)
     at com.installshield.product.service.product.PureJavaProductServiceImpl$Installer.execute(Unknown Source)
     at com.installshield.wizard.service.AsynchronousOperation.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
(Jul 11, 2008 7:43:08 AM), Install, com.installshield.product.service.product.PureJavaProductServiceImpl$InstallProduct, err, An error occurred and product uninstallation failed. Look at the log file C:\SAP\NSP\log.txt for details.
(Jul 11, 2008 7:43:08 AM), Install, com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles, err, ProductException: (error code = 200; message="Java error"; exception = [java.lang.Exception])
STACK_TRACE: 15
ProductException: (error code = 200; message="Java error"; exception = [java.lang.Exception])
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.execute(StepWrapperInstallFiles.java:254)
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.executeAllSteps(StepWrapperInstallFiles.java:224)
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.executeAllUninstallationSteps(StepWrapperInstallFiles.java:192)
     at com.sap.installshield.sdcstepswrapper.StepWrapperInstallFiles.uninstall(StepWrapperInstallFiles.java:313)
     at com.installshield.product.service.product.PureJavaProductServiceImpl.uninstallProductAction(Unknown Source)
     at com.installshield.product.service.product.PureJavaProductServiceImpl$InstallProduct.processActionsFailed(Unknown Source)
     at com.installshield.product.service.product.InstallableObjectVisitor.visitComponent(Unknown Source)
     at com.installshield.product.service.product.InstallableObjectVisitor.visitInstallableComponents(Unknown Source)
     at com.installshield.product.service.product.InstallableObjectVisitor.visitProductBeans(Unknown Source)
     at com.installshield.product.service.product.PureJavaProductServiceImpl$InstallProduct.install(Unknown Source)
     at com.installshield.product.service.product.PureJavaProductServiceImpl$Installer.execute(Unknown Source)
     at com.installshield.wizard.service.AsynchronousOperation.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)

Hi YUN SEOK,
I got the same error than you when I tried to install SAP NetWeaver ABAP Trial Version.
Could you help me in giving exactly the link you wrote.
https://www.sdn.sap.com/irj
Where is located exactly the answer ?
I looked at this link but I did not find the answer.
So could you give me exactly the location in this link ?
Thanks in advance.
STD,

Error Message - java.lang.LinkageError: loader constraint violation

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