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From "John Buslawski (JIRA)" <j...@apache.org>
Subject [jira] Created: (DIRSTUDIO-288) "SWTError: No more handles" error when repeatedly adding a new entry
Date Mon, 03 Mar 2008 23:12:51 GMT
"SWTError: No more handles" error when repeatedly adding a new entry
--------------------------------------------------------------------

                 Key: DIRSTUDIO-288
                 URL: https://issues.apache.org/jira/browse/DIRSTUDIO-288
             Project: Directory Studio
          Issue Type: Bug
          Components: studio-ldapbrowser
    Affects Versions: 1.1.0
         Environment: Windows XP SP2 all current updates applied
Eclipse 3.3
JDK1.5.0_11 with a 512m heap size
Directory Studio 1.1.0
Open DS 1.0.0

            Reporter: John Buslawski
            Priority: Critical



When adding a new entry in Directory Studio, Eclipse sometimes will crash with a "SWTError:
No more handles" error combined with either an OutOfMemoryError, an ArrayIndexOutOfBoundsException,
or NegativeArraySizeException.  The following steps were used to reproduce the problem:

Connect via LDAP Browser to an LDAP server.
Expand out the tree and pick an group object. In our implementation it would look like >
dc=initiatesystems,dc=com > ou=Groups > ou=System. Right-click on "cn=All Interactions"
and select New Entry. ("All Interactions" is a group object.)
In the New Entry dialog select "Create from scratch", click Next.
On the page, move the object classes from the right side to the left side one at a time starting
with "account" (the first one).
Once you have moved about 9 or 10 object classes to the left side, Eclipse will just shutdown
with no warning.

The following was in the Eclipse .log file:

!ENTRY org.eclipse.ui 4 0 2008-03-03 16:22:22.806
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTError: No more handles
	at org.eclipse.swt.SWT.error(SWT.java:3589)
	at org.eclipse.swt.SWT.error(SWT.java:3481)
	at org.eclipse.swt.SWT.error(SWT.java:3452)
	at org.eclipse.swt.graphics.Image.init(Image.java:1811)
	at org.eclipse.swt.graphics.Image.init(Image.java:1936)
	at org.eclipse.swt.graphics.Image.<init>(Image.java:490)
	at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:289)
	at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:227)
	at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:205)
	at org.apache.directory.studio.ldapbrowser.ui.wizards.NewEntryObjectclassWizardPage$1.getImage(Unknown
Source)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getImage(WrappedViewerLabelProvider.java:117)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:165)
	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:135)
	at org.eclipse.jface.viewers.AbstractTableViewer.doUpdateItem(AbstractTableViewer.java:386)
	at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:466)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.runtime.Platform.run(Platform.java:857)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:46)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:193)
	at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2026)
	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefreshAll(AbstractTableViewer.java:692)
	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:630)
	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:617)
	at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1433)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1368)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1330)
	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1431)
	at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:503)
	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1390)
	at org.apache.directory.studio.ldapbrowser.ui.wizards.NewEntryObjectclassWizardPage.add(Unknown
Source)
	at org.apache.directory.studio.ldapbrowser.ui.wizards.NewEntryObjectclassWizardPage.access$200(Unknown
Source)
	at org.apache.directory.studio.ldapbrowser.ui.wizards.NewEntryObjectclassWizardPage$7.widgetSelected(Unknown
Source)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
	at org.eclipse.jface.window.Window.open(Window.java:796)
	at org.apache.directory.studio.ldapbrowser.ui.actions.NewEntryAction.run(Unknown Source)
	at org.apache.directory.studio.ldapbrowser.common.actions.proxy.BrowserActionProxy.run(Unknown
Source)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
	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:504)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1169)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1144)

!ENTRY org.eclipse.ui 4 0 2008-03-03 16:23:21.728
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.OutOfMemoryError: Java
heap space)
	at org.eclipse.swt.SWT.error(SWT.java:3563)
	at org.eclipse.swt.SWT.error(SWT.java:3481)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:126)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3659)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3296)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
	at org.eclipse.jface.window.Window.open(Window.java:796)
	at org.apache.directory.studio.ldapbrowser.ui.actions.NewEntryAction.run(Unknown Source)
	at org.apache.directory.studio.ldapbrowser.common.actions.proxy.BrowserActionProxy.run(Unknown
Source)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
	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:504)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1169)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1144)
Caused by: java.lang.OutOfMemoryError: Java heap space


We think the error comes from using createImage() rather than getImage() in the getImage()
method in the LabelProvider inner class of NewEntryObjectclassWizardPage. It appears as though
the images keep getting recreated with freeing them. For example, the following line:

 BrowserUIPlugin.getDefault().getImageDescriptor( BrowserUIConstants.IMG_OCD_ABSTRACT ).createImage();


should be replaced with:
  
 BrowserUIPlugin.getDefault().getImage( BrowserUIConstants.IMG_OCD_ABSTRACT );



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