Every day when I start Eclipse, I get the following error:
An error has occurred. See the error log for more details.
Preferences listening notification error. See the Journal for more details.
Preferences listening notification error. Check the magazine for more details. java.lang.NullPointerException
Any idea what causes this?
When I restart Eclipse, I no longer get the error, but whenever I get this error, I have to recompile my code base. It may or may not be connected. It sounds like this, but I don't know yet.
EDIT 1:
Here are two subsections of the error log from \workspace\.metadata\.log :
Beginning of the log:
!SESSION 2011-11-30 10:22:09.734 ----------------------------------------------- eclipse.buildId=I20110613-1736 java.version=1.7.0 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product !ENTRY org.eclipse.osgi 2 0 2011-11-30 10:24:59.186 !MESSAGE While loading class "org.eclipse.m2e.jdt.internal.MavenClasspathVariableInitializer", thread "Thread[main,6,main]" timed out waiting (5007ms) for thread "Thread[org.eclipse.jdt.internal.ui.text.JavaReconciler,1,main]" to finish starting bundle "org.eclipse.m2e.jdt_1.0.100.20110804-1717 [491]". To avoid deadlock, thread "Thread[main,6,main]" is proceeding but "org.eclipse.m2e.jdt.internal.MavenClasspathVariableInitializer" may not be fully initialized. !STACK 0 org.osgi.framework.BundleException: State change in progress for bundle "reference:file:plugins/org.eclipse.m2e.jdt_1.0.100.20110804-1717.jar" by thread "org.eclipse.jdt.internal.ui.text.JavaReconciler". at org.eclipse.osgi.framework.internal.core.AbstractBundle.beginStateChange(AbstractBundle.java:1087) at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:297) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440) at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:268) at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:462) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:400) at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:476) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107) at java.lang.ClassLoader.loadClass(Unknown Source) at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:345) at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:229) at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1207) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55) at org.eclipse.jdt.core.JavaCore.getClasspathVariableInitializer(JavaCore.java:3034) at org.eclipse.jdt.core.JavaCore.getClasspathVariable(JavaCore.java:2897) at org.eclipse.jdt.internal.core.JavaModelManager.getResolvedVariablePath(JavaModelManager.java:2549) at org.eclipse.jdt.internal.core.JavaModelManager.resolveVariableEntry(JavaModelManager.java:2469) at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2645) at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2838) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1943) at org.eclipse.jdt.internal.core.JavaProject.buildStructure(JavaProject.java:461) at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:258) at org.eclipse.jdt.internal.core.Openable.openAncestors(Openable.java:504) at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:240) at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:518) at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:255) at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:241) at org.eclipse.jdt.internal.core.PackageFragmentRoot.getKind(PackageFragmentRoot.java:477) at org.eclipse.jdt.internal.core.PackageFragment.getKind(PackageFragment.java:290) at org.eclipse.jdt.internal.core.PackageFragment.validateExistence(PackageFragment.java:506) at org.eclipse.jdt.internal.core.Openable.exists(Openable.java:206) at org.eclipse.jdt.internal.core.PackageFragment.exists(PackageFragment.java:174) at org.eclipse.jdt.ui.StandardJavaElementContentProvider.exists(StandardJavaElementContentProvider.java:451) at org.eclipse.jdt.ui.StandardJavaElementContentProvider.getParent(StandardJavaElementContentProvider.java:249) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb$JavaEditorBreadcrumbContentProvider.getParent(JavaEditorBreadcrumb.java:333) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.BreadcrumbViewer.buildItemChain(BreadcrumbViewer.java:608) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.BreadcrumbViewer.buildItemChain(BreadcrumbViewer.java:610) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.BreadcrumbViewer.inputChanged(BreadcrumbViewer.java:306) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:280) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.EditorBreadcrumb.setInput(EditorBreadcrumb.java:169) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb.setInput(JavaEditorBreadcrumb.java:788) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.setBreadcrumbInput(JavaEditor.java:2007) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.showBreadcrumb(JavaEditor.java:1981) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.handlePreferenceStoreChanged(JavaEditor.java:2883) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.handlePreferenceStoreChanged(CompilationUnitEditor.java:1620) at org.eclipse.ui.texteditor.AbstractTextEditor$PropertyChangeListener.propertyChange(AbstractTextEditor.java:710) at org.eclipse.ui.texteditor.ChainedPreferenceStore.firePropertyChangeEvent(ChainedPreferenceStore.java:164) at org.eclipse.ui.texteditor.ChainedPreferenceStore.handlePropertyChangeEvent(ChainedPreferenceStore.java:431) at org.eclipse.ui.texteditor.ChainedPreferenceStore.access$0(ChainedPreferenceStore.java:408) at org.eclipse.ui.texteditor.ChainedPreferenceStore$PropertyChangeListener.propertyChange(ChainedPreferenceStore.java:69) at org.eclipse.ui.preferences.ScopedPreferenceStore$3.run(ScopedPreferenceStore.java:375) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.preferences.ScopedPreferenceStore.firePropertyChangeEvent(ScopedPreferenceStore.java:372) at org.eclipse.jdt.internal.ui.javaeditor.ToggleBreadcrumbAction.perspectiveActivated(ToggleBreadcrumbAction.java:135) at org.eclipse.ui.internal.PerspectiveListenerList$1.run(PerspectiveListenerList.java:74) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.PerspectiveListenerList.fireEvent(PerspectiveListenerList.java:58) at org.eclipse.ui.internal.PerspectiveListenerList.firePerspectiveActivated(PerspectiveListenerList.java:72) at org.eclipse.ui.internal.WorkbenchWindow.firePerspectiveActivated(WorkbenchWindow.java:1450) at org.eclipse.ui.internal.WorkbenchPage$18.runWithException(WorkbenchPage.java:3350) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757) at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803) at org.eclipse.ui.internal.Workbench$33.runWithException(Workbench.java:1595) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410) at org.eclipse.equinox.launcher.Main.main(Main.java:1386) Caused by: org.eclipse.osgi.framework.internal.core.AbstractBundle$BundleStatusException ... 101 more
EDIT 3:
Section java.lang.NullPointerException log:
!ENTRY org.eclipse.ui.workbench 4 2 2011-11-30 11:24:25.757 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench". !STACK 0 java.lang.NullPointerException at org.eclipse.m2e.jdt.internal.MavenClasspathVariableInitializer.initialize(MavenClasspathVariableInitializer.java:30) at org.eclipse.jdt.core.JavaCore.getClasspathVariable(JavaCore.java:2908) at org.eclipse.jdt.internal.core.JavaModelManager.getResolvedVariablePath(JavaModelManager.java:2549) at org.eclipse.jdt.internal.core.JavaModelManager.resolveVariableEntry(JavaModelManager.java:2469) at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2645) at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2838) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1943) at org.eclipse.jdt.internal.core.JavaProject.buildStructure(JavaProject.java:461) at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:258) at org.eclipse.jdt.internal.core.Openable.openAncestors(Openable.java:504) at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:240) at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:518) at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:255) at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:241) at org.eclipse.jdt.internal.core.PackageFragmentRoot.getKind(PackageFragmentRoot.java:477) at org.eclipse.jdt.internal.core.PackageFragment.getKind(PackageFragment.java:290) at org.eclipse.jdt.internal.core.PackageFragment.validateExistence(PackageFragment.java:506) at org.eclipse.jdt.internal.core.Openable.exists(Openable.java:206) at org.eclipse.jdt.internal.core.PackageFragment.exists(PackageFragment.java:174) at org.eclipse.jdt.ui.StandardJavaElementContentProvider.exists(StandardJavaElementContentProvider.java:451) at org.eclipse.jdt.ui.StandardJavaElementContentProvider.getParent(StandardJavaElementContentProvider.java:249) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb$JavaEditorBreadcrumbContentProvider.getParent(JavaEditorBreadcrumb.java:333) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.BreadcrumbViewer.buildItemChain(BreadcrumbViewer.java:608) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.BreadcrumbViewer.buildItemChain(BreadcrumbViewer.java:610) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.BreadcrumbViewer.inputChanged(BreadcrumbViewer.java:306) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:280) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690) at org.eclipse.jdt.internal.ui.javaeditor.breadcrumb.EditorBreadcrumb.setInput(EditorBreadcrumb.java:169) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb.setInput(JavaEditorBreadcrumb.java:788) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.setBreadcrumbInput(JavaEditor.java:2007) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.showBreadcrumb(JavaEditor.java:1981) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.handlePreferenceStoreChanged(JavaEditor.java:2883) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.handlePreferenceStoreChanged(CompilationUnitEditor.java:1620) at org.eclipse.ui.texteditor.AbstractTextEditor$PropertyChangeListener.propertyChange(AbstractTextEditor.java:710) at org.eclipse.ui.texteditor.ChainedPreferenceStore.firePropertyChangeEvent(ChainedPreferenceStore.java:164) at org.eclipse.ui.texteditor.ChainedPreferenceStore.handlePropertyChangeEvent(ChainedPreferenceStore.java:431) at org.eclipse.ui.texteditor.ChainedPreferenceStore.access$0(ChainedPreferenceStore.java:408) at org.eclipse.ui.texteditor.ChainedPreferenceStore$PropertyChangeListener.propertyChange(ChainedPreferenceStore.java:69) at org.eclipse.ui.preferences.ScopedPreferenceStore$3.run(ScopedPreferenceStore.java:375) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.preferences.ScopedPreferenceStore.firePropertyChangeEvent(ScopedPreferenceStore.java:372) at org.eclipse.jdt.internal.ui.javaeditor.ToggleBreadcrumbAction.perspectiveActivated(ToggleBreadcrumbAction.java:135) at org.eclipse.ui.internal.PerspectiveListenerList$1.run(PerspectiveListenerList.java:74) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.PerspectiveListenerList.fireEvent(PerspectiveListenerList.java:58) at org.eclipse.ui.internal.PerspectiveListenerList.firePerspectiveActivated(PerspectiveListenerList.java:72) at org.eclipse.ui.internal.WorkbenchWindow.firePerspectiveActivated(WorkbenchWindow.java:1450) at org.eclipse.ui.internal.WorkbenchPage$18.runWithException(WorkbenchPage.java:3350) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757) at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803) at org.eclipse.ui.internal.Workbench$33.runWithException(Workbench.java:1595) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604) 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 org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) 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(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) 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.Main.main(Main.java:1386)
EDIT 2:
I have confirmed that this error only appears on reboot. When I restart Eclipse, it does not appear. Or, if I started Eclipse after rebooting with a workspace that is very clean (there are no large projects in it) that does not cause an error, and then open my main project, the error does not appear. However, the error still occurs in the logs.
EDIT 4:
Software version:
- Eclipse Version: Indigo Release Build id: 20110615-0604
- Maven Version: 3.0.3
EDIT 5:
I thought that I would share my solution to solve this problem, the only thing that makes my project work when this error occurs that should clear all projects in Eclipse and automatically recompile them. I also need process-resources with Maven. And that makes my project work again.
EDIT 6:
I noticed that if I close Eclipse and load Eclipse with another (much more simplified) workspace (which I use to test Java code), it does not generate this error. Then, if I turn off this Eclipse instance and load Eclipse again with my main project, the error will disappear. I will continue to take notes on this to try to find out if this is related to my main project or not.