Re: [equinox-dev] What causes InvalidRegistryObjectException ?

[Oleg Besedin <obesedin@xxxxxxxxxx>]

Hi Gavin,
From your description it looks like
somebody is storing IConfigurationElement (internally implemented as ConfigurationElementHandle).
Copy-paste from its Javadoc:

 * These registry objects are intended
for relatively short-term use. Clients that 
 * deal with these objects must
be aware that they may become invalid if the 
 * declaring plug-in is updated
or uninstalled. If this happens, all methods except
 * {@link #isValid()} will throw
{@link InvalidRegistryObjectException}.

If this error happens in Eclipse itself
please open a bug against Platform/UI with the same information you provided
here. 

If this error happens in your code,
consider using IExtensionTracker. 

Sincerely,
Oleg Besedin

Gavin Bong <eclipsejunkie.20.geekrunner@xxxxxxxxxxxxxxx>
Sent by: equinox-dev-bounces@xxxxxxxxxxx

04/06/2007 04:15 AM

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Subject	[equinox-dev] What causes InvalidRegistryObjectException ?

Context: eclipse 3.2.1

Goal: track the ExtensionRegistry and maintain a list of available views
'
with a fixed prefix for the ViewID.

Error: I am getting an InvalidRegistryObjectException when I uninstall
a
fragment. The fragment (specifically fragmentBundle.jar below) contributes
a
ViewPart. It doesn't happen the first time the bundle is uninstalled

e.g. the sequence of events in the OSGi console:

1) install fragmentBundle.jar
2) refresh 51 (51 is fragmentBundle.jar in INSTALLED state)
3) uninstall 51
4) install fragmentBundle.jar
5) refresh 52 (52 is fragmentBundle.jar in INSTALLED state)

At this point my IPlatformRunnable bombs with a dialog that reads:

    Unable to load perspective.
    Reason: premature end of file.

And my log file contains the following exception:

!ENTRY org.eclipse.ui 4 0 2007-04-06 15:44:32.718
!MESSAGE Failed to execute runnable
(org.eclipse.core.runtime.InvalidRegistryObjectException: Invalid registry
   object)
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable
(org.eclipse.core.runtime.InvalidRegistryObjectException: 
    Invalid registry object)
at org.eclipse.swt.SWT.error(SWT.java:3374)
at org.eclipse.swt.SWT.error(SWT.java:3297)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:126)
   at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3325)
   at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971)
   at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
   at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
   at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
   at foo.myapp.Application.run(Application.java:72)

Caused by: org.eclipse.core.runtime.InvalidRegistryObjectException: Invalid
registry object 
at
org.eclipse.core.internal.registry.RegistryObjectManager.
    basicGetObject(RegistryObjectManager.java:271)
at
org.eclipse.core.internal.registry.RegistryObjectManager.
    getObject(RegistryObjectManager.java:261)
at
org.eclipse.core.internal.registry.ConfigurationElementHandle.
    getConfigurationElement(ConfigurationElementHandle.java:26)
                    
                     
                     
              
   at 
org.eclipse.core.internal.registry.ConfigurationElementHandle.
   getAttribute(ConfigurationElementHandle.java:34)
   at
org.eclipse.ui.internal.handlers.ActionDelegateHandlerProxy.
   toString(ActionDelegateHandlerProxy.java:565)
   at java.lang.String.valueOf(String.java:2615)      
                
at
java.lang.StringBuffer.append(StringBuffer.java:220)      
                    
      at
org.eclipse.ui.internal.handlers.HandlerActivation.toString
    (HandlerActivation.java:185)

     at java.lang.String.valueOf(String.java:2615)    
                    
                     
                     
    
     at java.lang.StringBuffer.append(StringBuffer.java:220)
at
org.eclipse.ui.internal.handlers.HandlerAuthority.
    resolveConflicts(HandlerAuthority.java:307)
                    
  at
org.eclipse.ui.internal.handlers.HandlerAuthority.
    activateHandler(HandlerAuthority.java:153)
                    
   at
org.eclipse.ui.internal.handlers.HandlerService.
    activateHandler(HandlerService.java:93)
                    
        at
org.eclipse.ui.internal.handlers.SlaveHandlerService.
     doActivation(SlaveHandlerService.java:237)
                    
at
org.eclipse.ui.internal.handlers.SlaveHandlerService.
     activateHandler(SlaveHandlerService.java:136)
                  at
org.eclipse.ui.internal.menus.LegacyActionPersistence.
    convertActionToHandler(LegacyActionPersistence.java:580)
      at
org.eclipse.ui.internal.menus.LegacyActionPersistence.
    readActions(LegacyActionPersistence.java:908)
                 at
org.eclipse.ui.internal.menus.LegacyActionPersistence.
      readActionsAndMenus(LegacyActionPersistence.java:974)
         at
org.eclipse.ui.internal.menus.LegacyActionPersistence.
    readObjectContributions(LegacyActionPersistence.java:1431)
    at
org.eclipse.ui.internal.menus.LegacyActionPersistence.
    read(LegacyActionPersistence.java:843)
                    
   at
org.eclipse.ui.internal.services.RegistryPersistence$3.
    run(RegistryPersistence.java:598)
                    
       at
org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)    
            
                    
                at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
  
                    
            
org.eclipse.core.runtime.InvalidRegistryObjectException: 
   Invalid registry object
    at
org.eclipse.core.internal.registry.RegistryObjectManager.
basicGetObject(RegistryObjectManager.java:271)
    at
org.eclipse.core.internal.registry.RegistryObjectManager.
getObject(RegistryObjectManager.java:261)
    at
org.eclipse.core.internal.registry.ConfigurationElementHandle.
getConfigurationElement(ConfigurationElementHandle.
java:26)
    at
org.eclipse.core.internal.registry.ConfigurationElementHandle.
getAttribute(ConfigurationElementHandle.java:34)
at
org.eclipse.ui.internal.handlers.ActionDelegateHandlerProxy.
toString(ActionDelegateHandlerProxy.java:565)
at java.lang.String.valueOf(String.java:2615)

Any ideas why this is happening ?

Thanks

G

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