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Home » Eclipse Projects » Eclipse Platform » ClassCircularityError on IConfigurationElement.createExecutableExtension in Eclipse 3.5
ClassCircularityError on IConfigurationElement.createExecutableExtension in Eclipse 3.5 [message #336978] Fri, 17 July 2009 17:35
Nels Beckman is currently offline Nels Beckman
Messages: 4
Registered: July 2009
Junior Member
Hi folks,

I am having a problem that seems vaguely reminiscent of bug 5875
(https://bugs.eclipse.org/bugs/show_bug.cgi?id=5875) except that was
apparently fixed in 3.3.

I have two plugins, Plural and a plugin it depends on, Crystal. In 3.4.1
everything works just fine, but in 3.5 I get a CoreException caused by a
ClassCircularityError. (Trace at the end of this message.) To compare I
used the exact same workspace. As shown in the stack trace, the
exception is thrown during a call from Crystal to
IConfigurationElement.createExecutableExtension, a method used to load a
class (Plural) that implements an extension point of Crystal.

I have investigated the class files but I see no obvious circularity and
I compiled all of the code with Eclipse, so it shouldn't be possible in
the first place.

Any ideas what might be wrong, or how I might go about diagnosing the
real problem?

Thanks,
Nels


org.eclipse.core.runtime.CoreException: Plug-in edu.cmu.cs.plural was
unable to load class edu.cmu.cs.plural.track.FractionalAnalysis.
at
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI .throwException(RegistryStrategyOSGI.java:180)
at
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI .createExecutableExtension(RegistryStrategyOSGI.java:164)
at
org.eclipse.core.internal.registry.ExtensionRegistry.createE xecutableExtension(ExtensionRegistry.java:874)
at
org.eclipse.core.internal.registry.ConfigurationElement.crea teExecutableExtension(ConfigurationElement.java:243)
at
org.eclipse.core.internal.registry.ConfigurationElementHandl e.createExecutableExtension(ConfigurationElementHandle.java: 51)
at
edu.cmu.cs.crystal.internal.AbstractCrystalPlugin.start(Abst ractCrystalPlugin.java:164)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$1 .run(BundleContextImpl.java:782)
at java.security.AccessController.doPrivileged(Native Method)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tartActivator(BundleContextImpl.java:773)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tart(BundleContextImpl.java:754)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWor ker(BundleHost.java:352)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.star t(AbstractBundle.java:280)
at
org.eclipse.osgi.framework.util.SecureAction.start(SecureAct ion.java:408)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter .postFindLocalClass(EclipseLazyStarter.java:111)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:449)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:211)
at
org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass (BundleLoader.java:376)
at
org.eclipse.osgi.internal.loader.SingleSourcePackage.loadCla ss(SingleSourcePackage.java:33)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInter nal(BundleLoader.java:449)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(Bund leLoader.java:405)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(Bund leLoader.java:393)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:105)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320 )
at
edu.cmu.cs.plural.errors.history.HistoryView.createPartContr ol(HistoryView.java:108)
at
org.eclipse.ui.internal.ViewReference.createPartHelper(ViewR eference.java:367)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReferen ce.java:226)
at
org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb enchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:31 3)
at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:52 9)
at
org.eclipse.ui.internal.presentations.PresentablePart.setVis ible(PresentablePart.java:180)
at
org.eclipse.ui.internal.presentations.util.PresentablePartFo lder.select(PresentablePartFolder.java:270)
at
org.eclipse.ui.internal.presentations.util.LeftToRightTabOrd er.select(LeftToRightTabOrder.java:65)
at
org.eclipse.ui.internal.presentations.util.TabbedStackPresen tation.selectPart(TabbedStackPresentation.java:473)
at
org.eclipse.ui.internal.PartStack.refreshPresentationSelecti on(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.ja va:668)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.ja va:576)
at
org.eclipse.ui.internal.PartSashContainer.createControl(Part SashContainer.java:568)
at
org.eclipse.ui.internal.PerspectiveHelper.activate(Perspecti veHelper.java:272)
at org.eclipse.ui.internal.Perspective.onActivate(Perspective.j ava:981)
at
org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPa ge.java:2626)
at
org.eclipse.ui.internal.WorkbenchWindow$27.run(WorkbenchWind ow.java:2964)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator .java:70)
at
org.eclipse.ui.internal.WorkbenchWindow.setActivePage(Workbe nchWindow.java:2945)
at
org.eclipse.ui.internal.WorkbenchWindow$21.runWithException( WorkbenchWindow.java:2262)
at
org.eclipse.ui.internal.StartupThreading$StartupRunnable.run (StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3 5)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr onizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3855)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3476)
at
org.eclipse.ui.application.WorkbenchAdvisor.openWindows(Work benchAdvisor.java:803)
at
org.eclipse.ui.internal.Workbench$28.runWithException(Workbe nch.java:1384)
at
org.eclipse.ui.internal.StartupThreading$StartupRunnable.run (StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3 5)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr onizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3855)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3476)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2316)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:22 21)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault (Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start (IDEApplication.java:113)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(Eclips eAppHandle.java:194)
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(EclipseS tarter.java:368)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe thodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java: 559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
Caused by: java.lang.ClassCircularityError:
edu/cmu/cs/crystal/IAnalysisInput
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.def ineClass(DefaultClassLoader.java:183)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineC lass(ClasspathManager.java:576)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findCla ssImpl(ClasspathManager.java:546)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClassImpl(ClasspathManager.java:477)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass_LockClassLoader(ClasspathManager.java:465)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:445)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:211)
at
org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass (BundleLoader.java:376)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInter nal(BundleLoader.java:452)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(Bund leLoader.java:405)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(Bund leLoader.java:393)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:105)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320 )
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.def ineClass(DefaultClassLoader.java:183)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineC lass(ClasspathManager.java:576)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findCla ssImpl(ClasspathManager.java:546)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClassImpl(ClasspathManager.java:477)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass_LockClassLoader(ClasspathManager.java:465)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:445)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:211)
at
org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass (BundleLoader.java:376)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInter nal(BundleLoader.java:452)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(Bund leLoader.java:405)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(Bund leLoader.java:393)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:105)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at
org.eclipse.osgi.internal.loader.BundleLoader.loadClass(Bund leLoader.java:321)
at
org.eclipse.osgi.framework.internal.core.BundleHost.loadClas s(BundleHost.java:231)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.load Class(AbstractBundle.java:1193)
at
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI .createExecutableExtension(RegistryStrategyOSGI.java:160)
... 75 more
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