Develop Reference

Unable to Acquire the State Change Lock

Our products are using the latest production-ready release of SWT, 3.7.2. Now since no one back then knew what the next Java version would be called (and how would they know that 8 came after 7, that's like higher mathematics), we were forced to swap the org.eclipse.osgi from 3.7.2 to 3.10.0, so that we can now support Java 8. While that's maybe not the best of ideas, in theory it should work.
Of course, being the major screw-up that Eclipse Luna is, there is this one "error" when we start our applications (about 50 percent of the time, I'd guess):
org.osgi.framework.BundleException: Unable to acquire the state change lock for the module: osgi.identity; osgi.identity="org.eclipse.osgi"; type="osgi.bundle"; version:Version="3.10.0.v20140606-1445"; singleton:="true" [id=0] STARTED [STARTED] invalid
at org.eclipse.osgi.container.Module.lockStateChange(Module.java:329)
at org.eclipse.osgi.container.SystemModule.init(SystemModule.java:44)
at org.eclipse.osgi.container.SystemModule.start(SystemModule.java:170)
at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:393)
at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:412)
at org.eclipse.equinox.internal.simpleconfigurator.ConfigApplier.startBundles(ConfigApplier.java:307)
at org.eclipse.equinox.internal.simpleconfigurator.ConfigApplier.install(ConfigApplier.java:108)
at org.eclipse.equinox.internal.simpleconfigurator.SimpleConfiguratorImpl.applyConfiguration(SimpleConfiguratorImpl.java:129)
at org.eclipse.equinox.internal.simpleconfigurator.SimpleConfiguratorImpl.applyConfiguration(SimpleConfiguratorImpl.java:143)
at org.eclipse.equinox.internal.simpleconfigurator.Activator.start(Activator.java:48)
at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:771)
at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:764)
at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:721)
at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:936)
at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:319)
at org.eclipse.osgi.container.Module.doStart(Module.java:571)
at org.eclipse.osgi.container.Module.start(Module.java:439)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1562)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)
at org.eclipse.osgi.container.SystemModule.startWorker(SystemModule.java:242)
at org.eclipse.osgi.container.Module.doStart(Module.java:571)
at org.eclipse.osgi.container.Module.start(Module.java:439)
at org.eclipse.osgi.container.SystemModule.start(SystemModule.java:172)
at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:393)
at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:412)
at org.eclipse.osgi.launch.Equinox.start(Equinox.java:115)
at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:320)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:232)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
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)
There's not much information on the web what the problem is, most suggest to just delete the workspace, but for most it only happens when starting up Eclipse, not the final applications - nonetheless, I deleted workspaces and the runtime-folders. Nothing helps. The "error" gets thrown in the exported product as well, but as far as I can tell, everything still works as expected.
Is there a way to fix it? And if not, is there a way to just hide that stupid exception (disable logging for a moment, clearing the log, whatever, I'm not picky)?

I solved problem by following these simple steps,
Go to your eclipse directory and open configuration directory.
open org.eclipse.osgi directory.
open .manager folder.
Delete .fileTableLock file.
Restart your eclipse.

This looks like the framework start up starts simpleconfigurator which tries to start the framework again. The framework detects this recursion and throws an exception to escape it. The problem appears to be in simpleconfigurator attempting the start the framework which is starting it.

I faced same issue.Deleting the given .log file from configuration folder and restarting eclipse should resolve your problem.

I use Red Hat Developer Studio 10.4 (Eclipse 4.6) and i tried use Eclipse Checkstyle plugin.
After install i restarted my IDE and received the crash notification.
I tried all suggestions but only when i delete a file called framework.info.34 my problem was solved.
This file is in %eclipse_home%/configuration/org.eclipse.osgi folder.

Issue pop-up after upgrading eclipse neon through update-site along with installation of some new plugins.
Step 01:
I removed .fileTable.* lock files from ${eclipse_home}/configuration/org.eclipse.osgi/.manager directory.
Step 02:
Removed osgi cache and other plugins cache by starting in eclipse clean mode
eclipse -clean

i have the same issue,
i removed the files from respective places
1) "eclipse\configuration\org.eclipse.osgi.manager"
.fileTableLock
.fileTable3
.fileTable4
2) eclipse\configuration
*.log
after that i opened the eclipse, it worked with out any restart of PC.

for people that have this problem until runing eclipse in runtime from eclipse :
clean folder :
[yourEclipseSourceWorkspace]/.metadata/.plugins/org.eclipse.pde.core/[yourRunConfiguration]/org.eclipse.osgi/.manager
[yourEclipseSourceWorkspace]/.metadata/.plugins/org.eclipse.pde.core/[yourRunConfiguration]/org.eclipse.osgi remove all files (not folder)
then add to your configuration -clean as programm arg

The solution is simple. Just start your eclipse in clean mode.
Find location of "eclipse.exe" file. (Let's assume : C:\eclipse\eclipse.exe )
Go to run command (Windows+R)
Enter [location] +[space][-]clean
Ex: C:\eclipse\eclipse.exe -clean

Faced the same issue . Remove the .fileTableLock from "eclipse\configuration\org.eclipse.osgi.manager" and restart eclipse . It works .

No project.properties file and NullPointerException during build of new android application

I'm having a horrible time figuring out a problem that makes it impossible for me to use the new android application wizard in ADT to create a new android project. First a little background. I've been using ADT (the ADT bundle) for about 6 months and haven't had a problem. Because the current issue only manifests when trying to create new projects (there are no issues with building existing projects), and I hadn't created a new project for a while, I don't know what may have precipitated it. Two things I can think of are:
I recently updated my OS to Mavericks.
I recently installed JDK 7 (I had been using 6)
Similar questions have been asked here and here, but the quality of answers don't seem very good to me. For one thing, I don't really want a workaround unless this is a legitimate bug. It doesn't seem to be a bug to me because I think a lot more people would be having issues. It's a pretty big problem. I think I must be missing something fairly obvious.
I can see that after it attempts to create the project, the directory structure of the project in the workspace appears correct, but almost all the files are missing, including project.properties, which seems to be involved in the problem I'm having based on the error log (below).
I've done the following:
First I tried updating both eclipse and the ADT. No luck
I tried creating projects in new workspaces
I deleted and re-downloaded the ADT bundle
I deleted and re-installed JDK 7 (following oracle's uninstall directions)
Upon clicking finish using the new android application wizard I get the following error message:
Errors occurred during the build.
Errors running builder 'Android Resource Manager' on project 'test'.
java.lang.NullPointerException
The error log looks like this (I wanted to include a screenshot, but the site won't let me because I'm a new user. Instead, I'm copying and pasting the messages in the order they appear in my log (from most recent to least recent):
Errors occurred during the build.
Errors running builder 'Android Resource Manager' on project 'test'.
Failed to load properties file for project 'test'
Failed to load properties file for project 'test'
Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
Failed to load properties file for project 'test'
[No message for this one, but stack trace is for an InvocationTargetException]
Failed to load properties file for project 'test'
Failed to load properties file for project 'test'
Finally, here are the stack traces for NPE and InvocationTargetException.
java.lang.NullPointerException
at com.android.ide.eclipse.adt.internal.build.builders.BaseBuilder.abortOnBadSetup(BaseBuilder.java:327)
at com.android.ide.eclipse.adt.internal.build.builders.ResourceManagerBuilder.build(ResourceManagerBuilder.java:92)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:733)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421)
at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:1028)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateWizard.performFinish(TemplateWizard.java:197)
at com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectWizard.performFinish(NewProjectWizard.java:1)
at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:827)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:432)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:628)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4166)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1489)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1474)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4012)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3651)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:826)
at org.eclipse.jface.window.Window.open(Window.java:802)
at org.eclipse.ui.internal.actions.NewWizardShortcutAction.run(NewWizardShortcutAction.java:135)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
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.Display.sendEvent(Display.java:4166)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1489)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1474)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4012)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3651)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.android.xml.AndroidXPathFactory
at com.android.manifmerger.ManifestMerger.process(ManifestMerger.java:332)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.mergeManifest(TemplateHandler.java:909)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.merge(TemplateHandler.java:745)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.access$7(TemplateHandler.java:690)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler$2.startElement(TemplateHandler.java:614)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1342)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2770)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:648)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:332)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.execute(TemplateHandler.java:580)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.access$1(TemplateHandler.java:563)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler$1.startElement(TemplateHandler.java:489)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1342)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2770)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:648)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:332)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.processVariables(TemplateHandler.java:456)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateHandler.render(TemplateHandler.java:310)
at com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectWizard.generateActivity(NewProjectWizard.java:418)
at com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectWizard.access$5(NewProjectWizard.java:401)
at com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectWizard$2.populate(NewProjectWizard.java:354)
at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreator.createEclipseProject(NewProjectCreator.java:759)
at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreator.access$1(NewProjectCreator.java:712)
at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreator$5.run(NewProjectCreator.java:914)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2345)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2327)
at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreator.create(NewProjectCreator.java:933)
at com.android.ide.eclipse.adt.internal.wizards.templates.NewProjectWizard.performFinish(NewProjectWizard.java:359)
at com.android.ide.eclipse.adt.internal.wizards.templates.TemplateWizard$1.run(TemplateWizard.java:201)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
This is my first question on stackoverflow. Please let me know how I can improve it. I'm using eclipse version 22.6.2-1085508 and
java version 1.7.0_60

Okay, so because I could not resolve this issue I had switched over to Android Studio and wasn't having any problems there, but when I got a new computer recently I figured I could just go back to the ADT bundle with no problem. Wrong. I had the exact same issue.
I don't understand why, but uninstalling jdk1.7.0_60.jdk "solved" this problem. I got the idea to try this from some other answers to questions (unfortunately, I'm having trouble finding them again to link). In any case, I haven't found an explanation for why this worked or any suggestion as to how to achieve it without uninstalling my JDK (which I need). Any answers or hints that would lead me in the right direction in figuring the cause out would be much appreciated. Otherwise, I guess I'll be making a new question.
Update
I've reinstalled the jdk and do not appear to be having problems.

You only fix eclipse.ini
...
openFile
--launcher.appendVmargs
-vm
/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Commands/java
-vmargs
-Dosgi.requiredJavaVersion=1.6
-XstartOnFirstThread
...
Good luck

I opened de eclipse.ini and changed the -Dosgi.requiredJavaVersion= parameter from 1.7 to 1.6, of course I have java 6 installed on machine, it works for me. I hope it helps you.

NullPointerException in eclipse in Eclipse itself at PartServiceImpl.internalFixContext

I have a problem about eclipse IDE, I can't open any file in my work space; if I try to open file, eclipse will alert the following error dialog
"An error has occurred. See error log for more details. java.lang.NullPointerException"
I go to see .log file in .meta at workspace and I see a paragraph in the file like this:
!ENTRY org.eclipse.jface 4 2 2557-04-09 11:40:49.422
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NullPointerException
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.internalFixContext(PartServiceImpl.java:380)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:341)
at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1029)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3047)
at org.eclipse.ui.internal.WorkbenchPage.access$22(WorkbenchPage.java:2969)
at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:2951)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2947)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2911)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2902)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:655)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:614)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:360)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:167)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:376)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:538)
at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866)
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.fireOpen(StructuredViewer.java:864)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152)
at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
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:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
How can I solve this problem - any idea?

There is a bug filed for Eclipse:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=385680
You could try restarting Eclipse, it helped the original poster of the issue there.

Better you update your eclipse by clicking it on help >> check for updates, also you can start eclipse by entering command in command prompt eclipse -clean.
Hope this will help you.

I have also encountered this error . Just i opened the new window ie Window -> New Window in eclipse .Then , I closed my old window. This solved my problem.

hi，that maybe the project's problem,
chose the project and setting you eclipse:
project -> clean...

After exiting eclipse I moved .eclipse (found in the user's home directory) to .eclipse.old (just in case I may have had to undo). The error does not show up any more and my projects are working fine after restarting eclipse.
Caution: I have a simple setup and this may not be the best for environments with advanced settings.
I am posting this as a separate answer as previously listed methods did not work for me.

I faced the same error, but only with files cloned from git that were assigned to a proprietary plugin.
I realized that even after cloning the files from git, I needed to create a new project or import a project in eclipse and this resolved the error.

Notes 9 rcp / IBM SBT SDK: How to get the endpoint correctly

I am currently developing an Notes 9 rcp plugin (using Eclipse, the Expeditor Toolkit and the SBT SDK java framework) for connecting to IBM Connections.
I first wrote a standard Java application to test the code (here: getting some blogs and manipulate them, using the SBT SDK) which works fine.
But if I use the code inside the plugin, I get an SBTException, that the endpoint wasn't found. So I wonder what I have to change in order to make it work.
I put the managed-bean.xml into the META-INF folder inside the plugin and configured the build properties accordingly. For testing purposes I hardcoded the configuration values in the XML in order to not have to deal with the location of the sbt.properties file.
I also tried to add another META-INF folder inside the src folder and put the managed-bean.xml there.
Creating new Service
RuntimeFactory: com.ibm.commons.runtime.impl.app.RuntimeFactoryStandalone#68c268c2
Application: com.ibm.commons.runtime.impl.app.ApplicationStandalone#19361936
Context: com.ibm.commons.runtime.impl.app.ContextStandalone#3fd83fd8
true
Fetching endpoint 'connections'
com.ibm.sbt.util.SBTException: Cannot find Endpoint connections
at com.ibm.sbt.services.endpoints.EndpointFactory.getEndpoint(EndpointFactory.java:60)
at com.ibm.sbt.services.endpoints.EndpointFactory.getEndpoint(EndpointFactory.java:52)
at de.myapp.service.SbtConnectorService.<init>(SbtConnectorService.java:28)
at de.myapp.service.SbtProfileConnectorService.<init>(SbtProfileConnectorService.java:30)
at de.myapp.menu.handler.ToConnectionsBlogMenuHandler.execute(ToConnectionsBlogMenuHandler.java:90)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:281)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
at org.eclipse.ui.menus.CommandContributionItem.handleWidgetSelection(CommandContributionItem.java:619)
at org.eclipse.ui.menus.CommandContributionItem.access$10(CommandContributionItem.java:605)
at org.eclipse.ui.menus.CommandContributionItem$4.handleEvent(CommandContributionItem.java:595)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4166)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3755)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.ibm.rcp.personality.framework.internal.RCPApplication.run(RCPApplication.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:611)
at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethodWithException(EclipseAppContainer.java:574)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:195)
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:60)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:611)
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)
Cannot find Endpoint connections
I wonder if I have to use other implementations for RuntimeFactory, Application and Context?
Any pointers / ideas are greatly appreciated.
Thanks in advance.

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 :-))