Develop Reference

java.lang.ClassNotFoundException: java.lang.constant.Constable after upgrading libraries

I have an application running in Tomcat 9.0.45 with JDK 11 (OpenJDK 11.0.11).
After upgrading some libraries (Spring 4.3.30 to 5.3.9) using maven, the application throws the following Exception:
java.lang.NoClassDefFoundError: java/lang/constant/Constable
at my.app.SomeClass.process(SomeClass.java:123) ~[classes/:?]
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) [spring-context-5.3.9.jar:5.3.9]
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) [?:?]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.base/java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.ClassNotFoundException: java.lang.constant.Constable
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1364) ~[catalina.jar:9.0.45]
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1187) ~[catalina.jar:9.0.45]
... 11 more
Obviously, it tries to run JRE 12 code in a JRE 11 environment.
As the Exception does not occur prior to updating the libraries, I guess some dependency got into the project that uses the JRE 12 code.
How can I find out which library/dependency causes the problem?
WebappClassLoaderBase debug log does not give any new information:
org.apache.catalina.loader.WebappClassLoaderBase.loadClass loadClass(java.lang.constant.Constable, false)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass Searching local repositories
org.apache.catalina.loader.WebappClassLoaderBase.findClass findClass(java.lang.constant.Constable)
org.apache.catalina.loader.WebappClassLoaderBase.findClass --> Returning ClassNotFoundException
Strangely, the Exception does not occur on my dev machine, so I also can't debug.
Any ideas are very much appreciated.
Edit: compiling with maven 3.8.1 using aspectj-maven-plugin 1.12.6.

The Constable interface (javadoc) was only added in Java 12.
So, your theory that the exception / stacktrace is caused by trying to run Java 12+ code on Java 11 is correct.
It is not entirely clear why this has happened. While the most recent versions of Spring are compatible with Java 16 ... they should also run on Java 11 (and indeed Java 8). It is possible that the Spring team have messed up and shipped some JARs that have been built incorrectly. But I doubt it.
I suspect that you have made a mistake in building your code. Maybe you compiled with a Java 12+ tool chain, against the Java SE 12+ runtime using a target version of Java 11?

#Stephen C pointed to the right direction - something has compiled something that way.
Turns out the machine that compiles the code, did not have Java 11 installed, but Java 16. (Still, that compiled perfectly runnable Java 11 code for Spring 4.3.30.)
I have removed Java 16 from the machine and installed Java 11 only. The code now runs without throwing the ClassNotFoundException.
As of why that happened, I still have no idea.

JAXBException when running lint test

I have an app that pass a lint test on circleCI, but fail on local machine with the following error
java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3090)
at java.base/java.lang.Class.getConstructor0(Class.java:3295)
at java.base/java.lang.Class.newInstance(Class.java:532)
at org.jetbrains.kotlin.cli.jvm.plugins.ServiceLoaderLite.loadImplementations(ServiceLoaderLite.kt:50)
at org.jetbrains.kotlin.kapt3.ClasspathBasedKapt3Extension$loadProcessors$efficientProcessorLoader$1.doLoadProcessors(Kapt3Extension.kt:83)
at org.jetbrains.kotlin.kapt3.base.ProcessorLoader.loadProcessors(ProcessorLoader.kt:45)
at org.jetbrains.kotlin.kapt3.base.ProcessorLoader.loadProcessors$default(ProcessorLoader.kt:28)
at org.jetbrains.kotlin.kapt3.ClasspathBasedKapt3Extension.loadProcessors(Kapt3Extension.kt:88)
at org.jetbrains.kotlin.kapt3.AbstractKapt3Extension.analysisCompleted(Kapt3Extension.kt:171)
at org.jetbrains.kotlin.kapt3.ClasspathBasedKapt3Extension.analysisCompleted(Kapt3Extension.kt:98)
at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM$analyzeFilesWithJavaIntegration$2.invoke(TopDownAnalyzerFacadeForJVM.kt:96)
at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration(TopDownAnalyzerFacadeForJVM.kt:106)
at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration$default(TopDownAnalyzerFacadeForJVM.kt:82)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler$analyze$1.invoke(KotlinToJVMBytecodeCompiler.kt:384)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler$analyze$1.invoke(KotlinToJVMBytecodeCompiler.kt:70)
at org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport.analyzeAndReport(AnalyzerWithCompilerReport.kt:107)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.analyze(KotlinToJVMBytecodeCompiler.kt:375)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:123)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:131)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:54)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:84)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:42)
at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:103)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$1$1$2.invoke(CompileServiceImpl.kt:442)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$1$1$2.invoke(CompileServiceImpl.kt:102)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:1027)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:137)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:1069)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.doCompile(CompileServiceImpl.kt:1026)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:441)
at jdk.internal.reflect.GeneratedMethodAccessor111.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:566)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
... 48 more
I do not use JAXB and I have no idea where does this come from. More frustrating is I can build my app without any error.
I have tried the solutions in the following links, but none of them works for my case.
https://www.concretepage.com/questions/556
How to resolve java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException in Java 9
Has anyone experienced similar issues?

The JAXB APIs are considered to be J2EE APIs, therefore not present default class path in Java SE 9. In JDK 11 they are completely removed. But, these Java EE APIs that were provided in JDK 6/7/8 are still in the JDK.

Edit 10/2020:
I ran into this issue again some time ago when CircleCi update their java image from jdk8 to jdk11. I was able to solve this issue by updating the Gradle tool. Looks like in the latest version of Gradle lint no longer use JAXB APIs.
Old answer: Today I finally solve this issue. Here is what I did.
I attempted to solve this issue by reinstalling Android Studio 3.4. However I couldn't even start up Android Studio and I ran into this
java.lang.RuntimeException:
com.intellij.ide.plugins.PluginManager$StartupAbortedException:
Fatal error initializing 'com.android.tools.idea.AndroidInitialConfigurator'
Then I looked for answers and came across this page
[Can't start Android Studio][1]
[1]: https://superuser.com/questions/1391452/cant-start-android-studio
I reverted back to use jdk 8.
Android Studio 3.4 finally started up, and JAXBException was gone.

WSO2 EMM java.lang.reflect.InvocationTargetException

I'm new with WSO2 products. I try WSO2 EMM and when I try to start emm 1.1.0 I get the following errors. I tried on Ubuntu, Debian and Windows and always the same issue.
It doesn't happen with the 1.0.0
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.wso2.carbon.bootstrap.Bootstrap.loadClass(Bootstrap.java:63)
at org.wso2.carbon.bootstrap.Bootstrap.main(Bootstrap.java:45)
Caused by: java.lang.RuntimeException: org.eclipse.core.runtime.adaptor.EclipseStarter
at org.wso2.carbon.server.CarbonLauncher.launch(CarbonLauncher.java:117)
at org.wso2.carbon.server.Main.launchCarbon(Main.java:163)
at org.wso2.carbon.server.Main.main(Main.java:95)
... 6 more
I already saw these errors but there was no answers.
Any ideas ?
Antoine

Ok, I answer to my own question, may be it could help...
It's still not working on linux, but it's now working on windows.
The only thing I did is ti strickly respect the folder name and structure
Let my explain:
When it was not working the structure of the folder was:
c:\wsoemm\bin...
now it's
c:\wso2\wsoeme-1.1.0\bin
This is the only thing I did to make it working
I would prefer running WSO2 EMM on linux so any help would be great.
Antoine

After 3 days it's now working on linux
you have to change the file null.ini wich is located at
/wherever you put the folder/wso2/wso2emm-1.1.0/repository/components/default
the default file is:
-install
/home/nira/git/EMM/product-emm/modules/p2-profile-gen/target/wso2carbon-core-4.2.0/repository/components/default
change it to:
-install
/wherever you put the folder/wso2/wso2emm-1.1.0/repository/components/default
That's it

Error when launching Java FX application on a headless Linux RedHat system

Trying to launch a java FX application on a Linux system using X. I get the following stack trace. After a bunch of googling and installing various packages, I am at a loss. Any thoughts?
java -jar tacoma_testing.jar
Prism-ES2 Error : GL_VERSION (major.minor) = 1.4
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.javafx.main.Main.launchApp(Main.java:698)
at com.javafx.main.Main.main(Main.java:871)
Caused by: java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: /projects/tacoma/tacoma_regression_testing/jdk1.7.0_25/jre/lib/amd64/libglass.so: libgio-2.0.so.0: cannot open shared object file: No such file or directory
at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:281)
at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:124)
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:163)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.UnsatisfiedLinkError: /projects/tacoma/tacoma_regression_testing/jdk1.7.0_25/jre/lib/amd64/libglass.so: libgio-2.0.so.0: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1957)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1882)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1843)
at java.lang.Runtime.load0(Runtime.java:795)
at java.lang.System.load(System.java:1061)
at com.sun.glass.utils.NativeLibLoader.loadLibraryFullPath(NativeLibLoader.java:200)
at com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:88)
at com.sun.glass.utils.NativeLibLoader.loadLibrary(NativeLibLoader.java:31)
at com.sun.glass.ui.Application.loadNativeLibrary(Application.java:73)
at com.sun.glass.ui.Application.loadNativeLibrary(Application.java:80)
at com.sun.glass.ui.gtk.GtkPlatformFactory$1.run(GtkPlatformFactory.java:28)
at com.sun.glass.ui.gtk.GtkPlatformFactory$1.run(GtkPlatformFactory.java:25)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.glass.ui.gtk.GtkPlatformFactory.<clinit>(GtkPlatformFactory.java:25)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at com.sun.glass.ui.PlatformFactory.getPlatformFactory(PlatformFactory.java:20)
at com.sun.glass.ui.Application.Run(Application.java:103)
at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:271)
... 5 more

Redhat is not listed as as supported configuration for JavaFX 2.2.
Nor is running JavaFX in a headless mode.
This may change for Java 8, but Java 8 has not been released yet, so the list of supported configurations for JavaFX running on Java 8 has not been published.
Currently the supported configuration set for Linux is only => Ubuntu 10.4+ gtk2 2.18+ with optional additional requirements for av codecs if you also want media playback support.
So try using a supported Ubuntu system instead of Redhat and you may or may not get that working in a headless environment.
I tested and it works fine with Redhat 6. Redhat 5 seems to be the problem.
Redhat Enterprise Linux 6 support will be added for Java 8 (to be released in the next few weeks).
A RHEL 5.5 support request was closed as won't fix, see RT-22564 "JavaFX Support for Red Hat Enterprise Linux 5.5".
If you can find a way to install gtk2 2.18+ on RHEL 5 you may be able to get it to work, though no promises.

NoClassDefFoundError in Eclipse RCP application

In our application we sometimes (about 1 out of 10 times) get a NoClassDefFoundError when trying to instantiate a class. It happens when a project is opened from without our application.
The full stack trace looks like this:
!ENTRY org.eclipse.jface 4 2 2011-11-18 12:45:33.941
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NoClassDefFoundError: com.mycompany.products.myapp.gui.model.provider.EMyAppObjectItemProvider
at com.mycompany.products.myapp.gui.model.provider.MyappguimodelItemProviderAdapterFactory.createMyAppGuiPortAdapter(MyappguimodelItemProviderAdapterFactory.java:159)
at com.mycompany.products.myapp.gui.model.util.MyappguimodelAdapterFactory$1.caseMyAppGuiPort(MyappguimodelAdapterFactory.java:185)
at com.mycompany.products.myapp.gui.model.util.MyappguimodelAdapterFactory$1.caseMyAppGuiPort(MyappguimodelAdapterFactory.java:1)
at com.mycompany.products.myapp.gui.model.util.MyappguimodelSwitch.doSwitch(MyappguimodelSwitch.java:226)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:59)
at org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:75)
at com.mycompany.products.myapp.gui.model.util.MyappguimodelAdapterFactory.createAdapter(MyappguimodelAdapterFactory.java:462)
at org.eclipse.emf.common.notify.impl.AdapterFactoryImpl.createAdapter(AdapterFactoryImpl.java:133)
at org.eclipse.emf.common.notify.impl.AdapterFactoryImpl.adaptNew(AdapterFactoryImpl.java:107)
at org.eclipse.emf.common.notify.impl.AdapterFactoryImpl.adapt(AdapterFactoryImpl.java:93)
at com.mycompany.products.myapp.gui.model.provider.MyappguimodelItemProviderAdapterFactory.adapt(MyappguimodelItemProviderAdapterFactory.java:1127)
at org.eclipse.emf.edit.provider.ComposedAdapterFactory.adapt(ComposedAdapterFactory.java:300)
at org.eclipse.emf.edit.provider.ComposedAdapterFactory.adapt(ComposedAdapterFactory.java:277)
at org.eclipse.emf.edit.provider.ComposedAdapterFactory.adapt(ComposedAdapterFactory.java:264)
at org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider.getColumnText(AdapterFactoryLabelProvider.java:496)
at org.eclipse.jface.viewers.TableColumnViewerLabelProvider.update(TableColumnViewerLabelProvider.java:70)
at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:152)
at org.eclipse.jface.viewers.AbstractTableViewer.doUpdateItem(AbstractTableViewer.java:399)
at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:485)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2167)
at org.eclipse.jface.viewers.AbstractTableViewer.createItem(AbstractTableViewer.java:277)
at org.eclipse.jface.viewers.AbstractTableViewer.internalRefreshAll(AbstractTableViewer.java:757)
at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:649)
at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:636)
at org.eclipse.jface.viewers.AbstractTableViewer$2.run(AbstractTableViewer.java:592)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404)
at org.eclipse.jface.viewers.AbstractTableViewer.inputChanged(AbstractTableViewer.java:590)
at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:280)
at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690)
at com.mycompany.products.myapp.gui.views.port.composites.Ipv4PortComposite.projectOpenedOrClosed(Ipv4PortComposite.java:732)
at com.mycompany.products.myapp.gui.project.MyAppResourceController.tellOpenCloseListeners(MyAppResourceController.java:186)
at com.mycompany.products.myapp.gui.actions.project.MyAppGuiResourceController.openProject(MyAppGuiResourceController.java:266)
at com.mycompany.products.myapp.gui.project.MyAppResourceController.open(MyAppResourceController.java:592)
at com.mycompany.products.myapp.gui.project.MyAppResourceController.openWithoutUpdating(MyAppResourceController.java:612)
at com.mycompany.products.myapp.gui.actions.file.MyAppRecentProjectAction.run(MyAppRecentProjectAction.java:55)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3588)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3209)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.mycompany.products.myapp.gui.MyAppApplication.start(MyAppApplication.java:175)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
at org.eclipse.equinox.launcher.M
These related questions didn't answer my problem:
NoClassDefFoundError on JFace FontRegistry
Getting class not found Exception when running in eclipse
From what I've read this exception occurs when the class is not found in the runtime class-path. So I think it would be useful if I could print the runtime search paths before the actual attempt at instantiation. This way I can check if there is any difference in the 1/10 times it fails. However, I haven't found yet how to get the list of runtime search paths. Any hints on how to get them?
Can anyone help me fix this problem?

For classloading issues Java offers some tools. Look Do you really get class loaders on Slideshare. I once had a similar problem with the help system of Eclipse which I integrated in my RCP product. When started within the IDE everything worked fine but when starting the exported product the help system just doesn't come up.

Do you get this when starting the application? This sounds like some bundles haven't been initialized at that point. OSGi will start modules based on the dependencies, but there's a random element when you don't have the proper dependencies set in place. I would suggest looking at that. If you want more info, you can use the OSGi console to examine your environment:
http://www.ibm.com/developerworks/library/os-ecl-osgiconsole/index.html
Hope this helps.

Try to run your application in the debugger with the OSGi console enabled (-console). Add a Class breakpoint for NoClassDefFoundError or alternatively on the offending line of code (MyappguimodelItemProviderAdapterFactory.java:159).
And, when the breakpoint is hit:
find the bundle ID of the bundle with MyappguimodelItemProviderAdapterFactory - e.g. with the ss OSGi command
find the complete status of the bundle with the bundle <id> OSGi command
check whether the package in question - com.mycompany.products.myapp.gui.model.provider - is wired correctly in the "Imported Packages" section
I don't know what can be wrong, but you should check that
the correct package wiring has been set up - possibly using packages com.mycompany.products.myapp.gui.model.provider OSGi command to find all the providers
the bundle with EMyAppObjectItemProvider actually includes the class - you can find the jar used by OSGi with the status OSGi command (don't assume you know :-))