Description Martin Vysny 2008-12-03 06:18:44 EST

This bug started to occur pretty frequently (probably) since I switched the VM Eclipse is running in from OpenJDK to JRockit. I am not sure if this is really the case though. The project VM is OpenJDK but Eclipse runs on JRockit.

Environment: 64bit linux 2.6.27 kernel, 64bit OpenJDK and JRockit, 64bit Eclipse 3.4.1 SDK linux gtk
Symptoms: several classes cannot be compiled because of missing java.lang.Object. When I try to verify contents of rt.jar (in the project's "JRE System Library" library container in Eclipse GUI) nothing is shown - the jar seems to be empty. rt.jar is available, both the path and rights are correct. Several restarts, clean/build seem to help. There is error in .log file:

!ENTRY org.eclipse.jdt.ui 4 10001 2008-12-03 11:18:12.150
!MESSAGE Internal Error
!STACK 1
Java Model Exception: Java Model Status [/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar is not on its project's build path]
	at org.eclipse.jdt.internal.core.PackageFragmentRoot.getRawClasspathEntry(PackageFragmentRoot.java:553)
	at org.eclipse.jdt.internal.ui.actions.JarImportWizardAction.selectionChanged(JarImportWizardAction.java:89)
	at org.eclipse.jdt.internal.ui.actions.JarImportWizardAction.selectionChanged(JarImportWizardAction.java:107)
	at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:162)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.runtime.Platform.run(Platform.java:880)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:48)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
	at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:160)
	at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2062)
	at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1138)
	at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1168)
	at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:227)
	at org.eclipse.jface.util.OpenStrategy.access$3(OpenStrategy.java:221)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:388)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1158)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3401)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3033)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
	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:386)
	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:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
!SUBENTRY 1 org.eclipse.jdt.core 4 1006 2008-12-03 11:18:12.163
!MESSAGE /usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar is not on its project's build path