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 popup comes up  then I m prompted to restart Eclipse  and the Event log says the following    org eclipse swt SWTError  No more handles     at org eclipse swt SWT error SWT java 4387      at org eclipse swt SWT error SWT java 4276      at org eclipse swt SWT error SWT java 4247      at org eclipse swt widgets Widget error Widget java 468      at org eclipse swt widgets Control createHandle Control java 704      at org eclipse swt widgets Label createHandle Label java 199      at org eclipse swt widgets Control createWidget Control java 744      at org eclipse swt widgets Control  lt init gt  Control java 112      at org eclipse swt widgets Label  lt init gt  Label java 101            I m attaching screenshots of the error messages  Has anyone else encountered this bug with Eclipse  Do you know of a work-around or a fix

User · Answer

I am running dual monitors and have had this issue with both Kepler and STS 3 4 0   Killing the HydraDM exe process worked for me

User · Answer

Well  somewhat answering my own question here  I am still unaware of what causes the issue  but I have found an alternative   Since the Juno release of Eclipse is relatively recent  the bug itself might have something to do with my system s configuration    I instead downloaded the latest version of its predecessor  Eclipse Indigo  Now I am able to use Eclipse just fine   As I do not require any of the new features of Juno  the Indigo release will do just fine

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It is hardware problem at all   If you have nView  turn off Desktop Manager  In case of ATI  turn off HydraVision   This works fine on Eclipse Kepler  Standard  and Android Developer Tools Edition

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The  bug  is discussed here https   bugs eclipse org bugs show bug cgi id 402983  A lot of discussion around  multiple monitor  set-ups  I experienced the problem today click in Eclipse  off-the-shelf ADT v22 3 0-887826  Package Explorer then click in java editor  and the  no more handles  error appears   It makes Eclipse unuseable   Got me thinking that it is a monitor graphics card problem on my win7 64bit PC  rather than a problem with Eclipse  I re-installed the graphics card  nVidia GTX480  and updated the drivers  Noticed multiple error dialog boxes samsung monitor not found  relating to my monitor in fact a single BX2440 monitor set-up  as i closed the system down for reboot  So  on re-boot I upgraded the monitor driver  Then booted again  and the problem has gone at least for now    BTW  I don t have Win 7 SP1 installed  so i don t think the  full Windows update  solution discussed elsewhere on SO necessarily works for everyone

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As suggested by Nineroad Installing WindowBuilder as the default editor for files with a   java extention fixed this issue for me   In Eclipse  navigate to Help   Install New Software  Add http   archive eclipse org windowbuilder WB release R201309271200 4 3 to the  Work with  path  select all components suggested  and install WindowBuilder   Once complete  Eclipse will request restart  Once restarted  within Eclipse navigate to Window   Preferences  In The Preferences dialogue-box navigate to General   Editor   File Associations  Under  File Associations  list  be sure to select   java file types  The bottom window  labeled  Associated Editors   should have WindowBuilder as an option  Select WindowBuilder and click  Default  to the right  to set WindowBuilder as your default   java file editor    This fixed the SWT error for me   Note  Eclipse Version  Kepler Service Release 2 Windows 7 64-bit

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I too faced this problem   OS   Ubuntu 18 04 LTS  I m using gnome  I switched from Gnome environment to Gnome Classic environment while logging in and it fixed the issue     You can also try other environments like unity - In my case this bug did not appear in Unity or Ubuntu  it only appeared in Gnome

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If you use DisplayFusion    Open Display Fusion settings page   Click compatibility tab   Add Eclipse or STS exe application Check  Disable TitleBar Buttons  this application only    Disable Application Hooks  this application only    and  Use Process file icon on DisplayFusion taskbar  not window icon      Reference  Display Fusion FIX

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Happens with Eclipse Mars 2 Release  4 5 2  and Multimon TaskBar 2 1 on a dual monitor setup  too  It disappears if MM TaskBar is un-loaded   UPDATE  Still the same with Oxygen 2 Release  4 7 2

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I have the same problem  It is caused by a screen capture software hypersnap7  So I think the hotkey conflict is the reason  Reboot computer  don t start other software  start Android Development Tools and watch which software triger the bug

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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

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I had the exact same issue  I found here a solution which works for me   https   bugs eclipse org bugs show bug cgi id 517671 c58  For me it was sufficient to put   export GTK IM MODULE ibus   into    profile   Hope this will help some of you also

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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

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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     lt updates    gt    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    positioning it inside the same  panel   indicated by a global and two inner panels borders rectangles around the editors  and  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    lt     updates gt    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

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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

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If you have a fresh Windows 7  force a Windows Update  That will make the problem go away  It s a shot in the dark  but solved my problem  I struggled with it for a day until I realized that newer eclipse releases give the above error with older  net Framework  everything went fine until a driver installed  net 4 0  and from that point Eclipse editor gave the unhandled event loop exception

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I had DisplayFusion running  which is a special Windows program used to manage multiple monitors  Turning it off seemed to fix this issue for me

User · Answer

There is a workaround  Change the Java editor to WindowBuilder    Eclipse  rarr  Windows  rarr  Preferences  rarr  File Associations  rarr   choose WindowBuilder Editor as Java default editor

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I have a nvidia GPU  and if nView is enabled it happens all the time   Try to disable it   It seems that eclipse is not very compatible with softwares that override system window management on multi screen     Hint how to disable nView  http   nviewdesktopmanager blogspot com 2011 08 how-to-disable-nview-desktop-manager html

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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

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For me this error was happening on a fresh Eclipse Luna SR2  4 4 2  install and when trying to add a Mercurial repository  I resolved after downgrading from Java 8 to Java 7

User · Answer

I had the same problem  turned out that TeamViewer was causing this   In your TeamViewer go to    Extras  rarr  Options  rarr  Advanced  rarr  QuickConnect button  configure it and disable the show QuickConnect button

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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   amp     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

User · Answer

I had the same problem and finally figured out  that it was the Logitech SetPoint Software   Deinstalled it - and the error is gone

[eclipse] Eclipse Bug: Unhandled event loop exception No more handles

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