Eclipse Bug: Unhandled event loop exception No more handles

Question

I\'ve built a GUI using Swing and the MigLayout.

I am using Eclipse 4.2.2 (64-bit) on Windows 7 Ultimate. Every time I click back into the window to edit my code, a

Answer 1

I had this issue after installing HP ProtectTools on HP Probook 6470b, because of included Password Manager.

To disable it run "HP ProtectTools Administrative Console", go to "Applications->Settings", open "Applications" tab and uncheck "Status" checkbox.

After PC restart problem should be solved, but you can't use Password Manager anymore :(

Answer 2

Wow, what a variety of causes of these error messages! I'll throw one more out:

In my case, Eclipse 4.17 on Ubuntu 16.04LTS was showing these messages for multiple operations. It turns out that 16.04LTS has GTK 3.18, but Eclipse 4.17 requires GTK 3.20. Updating GTK (https://askubuntu.com/questions/933010/how-to-upgrade-gtk-3-18-to-3-20-on-ubuntu-16-04) made the error messages go away.

Answer 3

For me, this causes by ATI Desktop Manager.

After killing "HydraDM.exe" process, the problem was gone. When I re-run it again, the problem return.

So if you're using ATI Graphic Card, try to open Task Manager, locate "HydraDM.exe" (or 64 bit version) then kill it.

Answer 4

in short: check out if the bold sections below may save your day :-)

(This answer may help but the source problem is still not found. I'll update my findings if satisfyingly solved.)

<updates...>

update: It just happened again and occurred on dragging/positioning of one XML file (Tomcats content.xml) underneath all other files. (Opened by "XML Editor": Provider: Eclipse Web Tools Platform, Plug-in Name: XML editor, Version: 1.0.700.v201005192212, Plug-in Id: org.eclipse.wst.xmleditor.doc.user)

update2: On further looking into it the error disappears when I move the editor back to the other files (all open editors in one area). Furthermore it appears only when entering or leaving this XML editor, not on e.g. making changes to it and saving it via CRTL+S. Other than that the JBoss-related exception from below occurs on the CTRL+S event, but independent of this issue (so it may not be related at all).

update3: Getting even closer: since some time there has been a new editor positioning feature around. (Initially I was a bit confused, but now I am getting the point and even visually can see what is meant and what makes the difference...). So there are two ways to position editors vertically or horizontally next to other editors:

1. positioning it inside the same "panel" (indicated by a global and two inner panels/borders/rectangles around the editors) and
2. positing it next to the old "panel" (indicated by a rectangle frame around the old panel and the new one.

So putting an editor in a new "global" panel (2.) works fine, putting it in a new "local" panel (1.) causes the issue (that's actually very helpful because I can still continue to work quite efficiently) (maybe somebody else could report this bug appropriately) (it also seems not related to the XML editor mentioned above since it also happens e.g. on property files)

update 4: I am using Windows 7 in hibernate mode. Meaning I don't start my Eclipse too often. Now I realized that Eclipse itself had been started (looking at the Task Manager) 2 times (visually and using ALT+TAB for open windows navigation this was not obvious). After (stopping/killing all open instances and) restarting the problem does not occur anymore.

update 5: In this duplicate question somebody stated it would have been solved by the latest windows update: https://stackoverflow.com/a/19316804/1915920 . I'll check this out for myself, but currently I cannot reproduce the problem anyways.

update 6: In another situation I had this and it seemed related to some property window (in this case Jasper Reports) that updated its content automatically, based on the current editor (like an outline view). So it could be a good idea to close and re-open (all) outline and/or property windows.

</...updates>

The error in general indicates, that some program(s) have (propably) unusually many (probably thousands?) of operating system file handles open. So one should check if outside or inside of Eclipse a lot of files are opened at the same time or opened over a short period of time, but not properly closed (they could be visually closed, but the operating system still thinks they are beeing used because the application did not properly free the file handles somehow).

Now I have this issue currently as well. If I look in the Error Log (Window->Show View->General->Error Log) I can see a lot of the following org.jboss.ide.eclipse.archives.core.* exceptions immediately before. Since I don't use the installed JBoss Developer Studio Plugin (that is likely related to this one) right now and no associated window or editor is opened (only some toolbar "JBoss Central" and perspective "JBoss" buttons) I'll have a look if disabling these will help on this sporadic problem. Also I closed all open editors, restarted Eclipse and open them and can't see this issue right now again.

Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".

...

java.lang.NullPointerException
    at org.jboss.ide.eclipse.archives.core.WorkspaceChangeListener$2.visit(WorkspaceChangeListener.java:74)
    at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
    at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:49)
    at org.jboss.ide.eclipse.archives.core.WorkspaceChangeListener.resourceChanged(WorkspaceChangeListener.java:70)
    at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
    at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
    at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:396)
    at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1531)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2354)
    at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118)
    at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:75)
    at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:65)
    at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:456)
    at org.eclipse.ui.editors.text.TextFileDocumentProvider.saveDocument(TextFileDocumentProvider.java:772)
    at org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:5068)
    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.jboss.tools.common.editor.ObjectMultiPageEditor.saveX(ObjectMultiPageEditor.java:403)
    at org.jboss.tools.common.editor.ObjectMultiPageEditor.doSave(ObjectMultiPageEditor.java:385)
    at org.eclipse.ui.internal.SaveableHelper$2.run(SaveableHelper.java:150)
    at org.eclipse.ui.internal.SaveableHelper$5.run(SaveableHelper.java:276)
    at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
    at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
    at org.eclipse.ui.internal.WorkbenchWindow$13.run(WorkbenchWindow.java:1812)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:1809)
    at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:284)
    at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:263)
    at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:155)
    at org.eclipse.ui.internal.WorkbenchPage.saveSaveable(WorkbenchPage.java:3777)
    at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3790)
    at org.jboss.tools.common.model.ui.texteditors.SaveAction3.run(PropertiesTextEditorComponent.java:357)
    at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
    at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:119)
    at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
    at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:243)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:224)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
    at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:167)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)
    at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
    at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:285)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:504)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:555)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:376)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:322)
    at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:84)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1056)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1108)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
    at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1525)
    at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4723)
    at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:344)
    at org.eclipse.swt.widgets.Control.windowProc(Control.java:4611)
    at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
    at org.eclipse.swt.widgets.Display.windowProc(Display.java:4977)
    at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
    at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
    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(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:636)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1426)

...

eclipse.buildId=4.3.0.I20130605-2000
java.version=1.7.0_25
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=de_DE
Framework arguments:  -product org.eclipse.epp.package.reporting.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.reporting.product

installed plugins (Help->About Eclipse->Installation Details->Installed Software: mark all + CTRL+C): (Eclipse Kepler Java EE and BIRT edition as base install)

  Apache Directory Studio LDAP Browser  2.0.0.v20130628 org.apache.directory.studio.ldapbrowser.feature.feature.group   Apache Software Foundation
  DevUtilsFeature   1.0.9.201209201734  DevUtilsFeature.feature.group   null
  Eclipse IDE for Java and Report Developers    2.0.0.20130613-0530 epp.package.reporting   null
  GlassFish Tools   6.2.0.201307232054  oracle.eclipse.tools.glassfish.feature.group    Oracle
  JarPlug   0.6.1   com.simontuffs.eclipse.jarplug.feature.feature.group    simontuffs.com
  Jaspersoft Studio feature 5.2.0   com.jaspersoft.studio.feature.feature.group Jaspersoft Corporation
  Java EE 5 Documentation   6.2.0.201307232054  oracle.eclipse.tools.javaee.doc.v5.feature.group    Oracle
  Java EE 6 Documentation   6.2.0.201307232054  oracle.eclipse.tools.javaee.doc.v6.feature.group    Oracle
  Java EE 7 Documentation   6.2.0.201307232054  oracle.eclipse.tools.javaee.doc.v7.feature.group    Oracle
  JBoss Developer Studio (Core Features)    7.0.0.GA-v20130720-0044-B364    com.jboss.jbds.product.feature.feature.group    JBoss by Red Hat
  Log Viewer Feature    0.9.8.8 de.anbos.eclipse.logviewer.feature.feature.group    Andre Bossert
  MercurialEclipse  2.1.0.201304290948  mercurialeclipse.feature.group  MercurialEclipse project
  MyLV  1.0.4   mylv_feature.feature.group  null
  Oracle ADF Documentation (11.1.1.4)   6.2.0.201307232054  oracle.eclipse.tools.adf.doc.v11114.feature.group   Oracle
  Oracle ADF Documentation (11.1.1.5)   6.2.0.201307232054  oracle.eclipse.tools.adf.doc.v11115.feature.group   Oracle
  Oracle ADF Documentation (11.1.1.6)   6.2.0.201307232054  oracle.eclipse.tools.adf.doc.v11116.feature.group   Oracle
  Oracle ADF Documentation (11.1.1.7)   6.2.0.201307232054  oracle.eclipse.tools.adf.doc.v11117.feature.group   Oracle
  Oracle ADF Documentation (12.1.2) 6.2.0.201307232054  oracle.eclipse.tools.adf.doc.v1212.feature.group    Oracle
  Oracle ADF Tools  6.2.0.201307232054  oracle.eclipse.tools.adf.feature.group  Oracle
  Oracle Cloud Tools    6.2.0.201307232054  oracle.eclipse.tools.cloud.feature.group    Oracle
  Oracle Coherence Tools    6.2.0.201307232054  oracle.eclipse.tools.coherence.feature.group    Oracle
  Oracle Database Tools 6.2.0.201307232054  oracle.eclipse.tools.database.feature.group Oracle
  Oracle Java EE Tools  6.2.0.201307232054  oracle.eclipse.tools.javaee.feature.group   Oracle
  Oracle Maven Tools    6.2.0.201307232054  oracle.eclipse.tools.maven.feature.group    Oracle
  Oracle Spring Tools   6.2.0.201307232054  oracle.eclipse.tools.spring.feature.group   Oracle
  Oracle WebLogic Scripting Tools   6.2.0.201307232054  oracle.eclipse.tools.weblogic.scripting.feature.group   Oracle
  Oracle WebLogic Server Tools  6.2.0.201307232054  oracle.eclipse.tools.weblogic.feature.group Oracle
  Toad® Extension for Eclipse - Community Edition - Core Plugin 1.8.3.201308140922  com.quest.toadext.core.feature.feature.group    Quest Software, Inc.
  Toad® Extension for Eclipse - Community Edition - MySQL DB Plugin 1.8.3.201308140922  com.quest.toadext.mysql.feature.feature.group   Quest Software, Inc.
  Toad® Extension for Eclipse - Community Edition - Oracle Database Plugin  1.8.3.201308140922  com.quest.toadext.feature.feature.group Quest Software, Inc.
  Toad® Extension for Eclipse - Community Edition - PostgreSQL Plugin   1.8.3.201308140922  com.quest.toadext.postgre.feature.feature.group Quest Software, Inc.                

Answer 5

"unhandled event loop exception .. no more handles" error (in my case) was caused by the driver of my mouse ! closing my mouse driver solved the problem. It has nothing to do with Eclipse versions, I tried almost all versions after Helios(in both 64bit/32bit) and all of them have the same problem, I also tried to add Eclipse/JRE variable path within advanced windows settings "environment variables". To help you to resolve this error try to close up unused applications and drivers.

Answer 6

I found now 2 ways to work with eclipse without getting “SWTError: No more handles” on my Dell ProBook 6550b Windows 7 64 bit but none of them is really satisfying: I can start windows in “secure mode” or I can downgrade to “eclipse-jee-indigo-SR2-win32-x86_64”. I will now try to kill one process after the other until kepler starts working respective until I arrive in secure mode.

... and then a few hours later ...

Finally (for now) I could solve the issue (at least on my laptop: Dell ProBook 6550b Windows 7 64). I “just” had to kill the processes: “DPAgent.exe*32” (DigitalPersona Local Agent) & “DPAgent.exe” (DigitalPersona 64-bit Helper Process) which were luckily running under my user (and not SYSTEM which might have made it impossible to kill depending on your rights). Nevertheless I don't understand how these processes can interfere with SWT handles in eclipse ....

More information on this issue can as well be found here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=402983