| Very strange LinkageError during plugin loading [message #329107] |
Thu, 12 June 2008 19:34  |
Eclipse User |
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Originally posted by: eclipse-news.rizzoweb.com
Hopefully someone can follow what I'm about to attempt to describe - it
is very hard to put into words.
We have developed a BaseUIPlugin (that extends
org.eclipse.ui.plugin.AbstractUIPlugin) for all of our plugins to
extend. In BaseUIPlugin.start() we refer to a utility class,
LoggerHelper, from our non-UI plugin (CorePlugin). We have several
plugins whose activator class extends BaseUIPlugin and most of the time
this works just fine. For example, I have AppUIPlugin that is a concrete
subclass of BaseUIPlugin.
However, I've just encountered a problem when I tried to take another
plugin (AppExtensionPlugin) that did not extend BaseUIPlugin and make it
extend BaseUIPlugin. I end up with a java.lang.LinkageError when
BaseUIPlugin is trying to load, and the exception message refers to the
utility class LoggerHelper (from the CorePlugin project).
I don't understand why making the new AppExtensionPlugin extend
BaseUIPlugin would cause it (and other subclasses of BaseUIPlugin) to
throw this exception.
I've tried to reproduce this with a small set of simple plugin projects,
trying to replicate the dependencies, but with not luck. My simple
example works as expected.
The root exception stack trace is below. I am immensely grateful for any
ideas, pointers, shots-in-the-dark, whatever...
Eric
java.lang.LinkageError: org/company/package/LoggerHelpers
at org.xxx.BaseUIPlugin.start(BaseUIPlugin.java:49)
at org.xxx.app.AppExtensionPlugin.start(AppExtensionPlugin.java :45)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$2 .run(BundleContextImpl.java:999)
at java.security.AccessController.doPrivileged(Native Method)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tartActivator(BundleContextImpl.java:993)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tart(BundleContextImpl.java:974)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWor ker(BundleHost.java:346)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.star t(AbstractBundle.java:260)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAct ion.java:400)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter .postFindLocalClass(EclipseLazyStarter.java:111)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:417)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:189)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLo calClass(BundleLoader.java:340)
at
org.eclipse.osgi.framework.internal.core.SingleSourcePackage .loadClass(SingleSourcePackage.java:37)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl assInternal(BundleLoader.java:405)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:369)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:357)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319 )
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.def ineClass(DefaultClassLoader.java:161)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineC lass(ClasspathManager.java:501)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findCla ssImpl(ClasspathManager.java:471)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClassImpl(ClasspathManager.java:430)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:413)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:189)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLo calClass(BundleLoader.java:340)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl assInternal(BundleLoader.java:408)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:369)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:357)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.loadCl ass(BundleLoader.java:289)
at
org.eclipse.osgi.framework.internal.core.BundleHost.loadClas s(BundleHost.java:227)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.load BundleActivator(AbstractBundle.java:134)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tart(BundleContextImpl.java:970)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWor ker(BundleHost.java:346)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.star t(AbstractBundle.java:260)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAct ion.java:400)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter .postFindLocalClass(EclipseLazyStarter.java:111)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:417)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:189)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLo calClass(BundleLoader.java:340)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl assInternal(BundleLoader.java:408)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:369)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:357)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.loadCl ass(BundleLoader.java:289)
at
org.eclipse.osgi.framework.internal.core.BundleHost.loadClas s(BundleHost.java:227)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.load Class(AbstractBundle.java:1269)
at
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI .createExecutableExtension(RegistryStrategyOSGI.java:160)
at
org.eclipse.core.internal.registry.ExtensionRegistry.createE xecutableExtension(ExtensionRegistry.java:788)
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
org.xxx.model.TypeRegistry.loadTypeDescriptorsFromExtensions (TypeRegistry.java:181)
at org.xxx.model.TypeRegistry.<clinit>(TypeRegistry.java:50)
at org.xxx.core.CorePlugin.mapCoreResourceFactory(CorePlugin.ja va:116)
at org.xxx.core.CorePlugin.start(CorePlugin.java:89)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$2 .run(BundleContextImpl.java:999)
at java.security.AccessController.doPrivileged(Native Method)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tartActivator(BundleContextImpl.java:993)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tart(BundleContextImpl.java:974)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWor ker(BundleHost.java:346)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.star t(AbstractBundle.java:260)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAct ion.java:400)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter .postFindLocalClass(EclipseLazyStarter.java:111)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:417)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:189)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLo calClass(BundleLoader.java:340)
at
org.eclipse.osgi.framework.internal.core.SingleSourcePackage .loadClass(SingleSourcePackage.java:37)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl assInternal(BundleLoader.java:405)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:369)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:357)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319 )
at org.xxx.BaseUIPlugin.start(BaseUIPlugin.java:49)
at org.xxx.ui.AppUIPlugin.start(AppUIPlugin.java:86)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$2 .run(BundleContextImpl.java:999)
at java.security.AccessController.doPrivileged(Native Method)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tartActivator(BundleContextImpl.java:993)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.s tart(BundleContextImpl.java:974)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWor ker(BundleHost.java:346)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.star t(AbstractBundle.java:260)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAct ion.java:400)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter .postFindLocalClass(EclipseLazyStarter.java:111)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLoc alClass(ClasspathManager.java:417)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.fin dLocalClass(DefaultClassLoader.java:189)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLo calClass(BundleLoader.java:340)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl assInternal(BundleLoader.java:408)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:369)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findCl ass(BundleLoader.java:357)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loa dClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.loadCl ass(BundleLoader.java:289)
at
org.eclipse.osgi.framework.internal.core.BundleHost.loadClas s(BundleHost.java:227)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.load Class(AbstractBundle.java:1269)
at
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI .createExecutableExtension(RegistryStrategyOSGI.java:160)
at
org.eclipse.core.internal.registry.ExtensionRegistry.createE xecutableExtension(ExtensionRegistry.java:788)
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 org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugi n.java:252)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator .java:67)
at
org.eclipse.ui.internal.WorkbenchPlugin.createExtension(Work benchPlugin.java:248)
at
org.eclipse.ui.internal.registry.ViewDescriptor.createView(V iewDescriptor.java:69)
at
org.eclipse.ui.internal.ViewReference.createPartHelper(ViewR eference.java:327)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReferen ce.java:227)
at
org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb enchPartReference.java:592)
at
org.eclipse.ui.internal.WorkbenchPage$ActivationList.setActi ve(WorkbenchPage.java:4080)
at
org.eclipse.ui.internal.WorkbenchPage$17.runWithException(Wo rkbenchPage.java:3145)
at
org.eclipse.ui.internal.StartupThreading$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:129)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3659)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3296)
at
org.eclipse.ui.application.WorkbenchAdvisor.openWindows(Work benchAdvisor.java:801)
at
org.eclipse.ui.internal.Workbench$25.runWithException(Workbe nch.java:1342)
at
org.eclipse.ui.internal.StartupThreading$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:129)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav a:3659)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3296)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2309)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:22 19)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault (Realm.java:289)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start (IDEApplication.java:106)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(Eclips eAppHandle.java:169)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .runApplication(EclipseAppLauncher.java:106)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .start(EclipseAppLauncher.java:76)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:363)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:176)
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:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java: 508)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
at org.eclipse.equinox.launcher.Main.main(Main.java:1148)
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| Re: Very strange LinkageError during plugin loading [message #330171 is a reply to message #330163] |
Thu, 17 July 2008 21:19  |
| Eclipse User |
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Originally posted by: eclipse-news.rizzoweb.com
Ryan Norris wrote:
> I've seen this error before when my target accidentally contained
> multiple versions of a plug-in that contained the class with the linkage
> error.
Hmm, I don't think that would be the problem in my case, because the
class with the linkage error is one of our own in our plugin. In other
words, it is a workspace class, not coming from the target.
Eric
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