This is typically caused by a bug in OpenJDK. If you run Eclipse using
the latest Sun/Oracle JVM instead, it should be fine.

On Nov 11, 8:26 am, Meeta Krishnamurthi <[email protected]> wrote:
> Hey
>
> I am using the GWT Designer downloaded from the latest Update Site for
> Eclipse 3.6.
>
> I seem to be unable to add any of the TextBox Controls (TextBox,
> TextArea, PasswordTextBox) those inheriting from TextBoxBase from the
> Palette. Clicking on any of these generates the following error in the
> Designer Editor Erros
>
> Palette: can not load component com.google.gwt.user.client.ui.TextArea
> Stack trace:
>
> java.beans.IntrospectionException: type mismatch between read and
> write methods
>         at
> java.beans.PropertyDescriptor.findPropertyType(PropertyDescriptor.java:
> 657)
>         at
> java.beans.PropertyDescriptor.setWriteMethod(PropertyDescriptor.java:
> 318)
>         at java.beans.PropertyDescriptor.<init>(PropertyDescriptor.java:140)
>         at
> com.instantiations.designer.core.utils.reflect.ReflectionUtils.addPropertyD 
> escriptor(ReflectionUtils.java:
> 1256)
>         at
> com.instantiations.designer.core.utils.reflect.ReflectionUtils.getPropertyD 
> escriptors(ReflectionUtils.java:
> 1200)
>         at
> com.instantiations.designer.core.model.description.rules.StandardBeanProper 
> tiesRule.begin(StandardBeanPropertiesRule.java:
> 37)
>         at org.apache.commons.digester.Digester.startElement(Digester.java:
> 1563)
>         at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(A 
> bstractSAXParser.java:
> 504)
>         at
> com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyE 
> lement(AbstractXMLDocumentParser.java:
> 182)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scan 
> StartElement(XMLDocumentFragmentScannerImpl.java:
> 1315)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
> $FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2723)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocu 
> mentScannerImpl.java:
> 624)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scan 
> Document(XMLDocumentFragmentScannerImpl.java:
> 486)
>         at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Co 
> nfiguration.java:
> 810)
>         at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Co 
> nfiguration.java:
> 740)
>         at
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:
> 110)
>         at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Abstract 
> SAXParser.java:
> 1208)
>         at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl
> $JAXPSAXParser.parse(SAXParserImpl.java:525)
>         at org.apache.commons.digester.Digester.parse(Digester.java:1887)
>         at
> com.instantiations.designer.core.model.description.helpers.ComponentDescrip 
> tionHelper.getDescription0(ComponentDescriptionHelper.java:
> 361)
>         at
> com.instantiations.designer.core.model.description.helpers.ComponentDescrip 
> tionHelper.getDescription0(ComponentDescriptionHelper.java:
> 266)
>         at
> com.instantiations.designer.core.model.description.helpers.ComponentDescrip 
> tionHelper.getDescription(ComponentDescriptionHelper.java:
> 236)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ComponentEntryI 
> nfo.ensureDescriptions(ComponentEntryInfo.java:
> 237)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ComponentEntryI 
> nfo.createTool(ComponentEntryInfo.java:
> 362)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ToolEntryInfo
> $1.runObject(ToolEntryInfo.java:28)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ToolEntryInfo
> $1.runObject(ToolEntryInfo.java:1)
>         at
> com.instantiations.designer.core.utils.execution.ExecutionUtils.runObjectLo 
> g(ExecutionUtils.java:
> 268)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ToolEntryInfo.a 
> ctivate(ToolEntryInfo.java:
> 23)
>         at com.instantiations.designer.core.editor.palette.DesignerPalette
> $3.activate(DesignerPalette.java:253)
>         at
> com.instantiations.designer.core.controls.palette.PaletteComposite.selectEn 
> try(PaletteComposite.java:
> 206)
>         at com.instantiations.designer.core.controls.palette.PaletteComposite
> $EntryFigure$1.mouseUp(PaletteComposite.java:726)
>         at com.instantiations.draw2d.EventManager
> $2.invokeListener(EventManager.java:217)
>         at com.instantiations.draw2d.EventManager.sendEvent(EventManager.java:
> 177)
>         at
> com.instantiations.draw2d.EventManager.handleMouseEvent(EventManager.java:
> 164)
>         at com.instantiations.draw2d.EventManager.mouseUp(EventManager.java:
> 155)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 57)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp 
> l.java:
> 43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at com.instantiations.draw2d.EventManager$8.invoke(EventManager.java:
> 288)
>         at $Proxy1.mouseUp(Unknown Source)
>         at
> org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
> 213)
>         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:
> 3540)
>         at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)
>         at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:
> 2640)
>         at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
>         at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
>         at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
>         at
> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:
> 332)
>         at
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:
> 664)
>         at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:
> 149)
>         at
> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication 
> .java:
> 115)
>         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(EclipseA 
> ppLauncher.java:
> 79)
>         at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
> 369)
>         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(DelegatingMethodAccessorImp 
> l.java:
> 43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
>         at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
>         at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
>
> Full stack trace (to see full context):
>
> java.lang.Error: PropertyDescriptor(public java.lang.Object
> com.google.gwt.user.client.ui.TextBoxBase.getValue(), public void
> com.google.gwt.user.client.ui.ValueBoxBase.setValue(java.lang.Object))
>         at
> com.instantiations.designer.core.utils.reflect.ReflectionUtils.addPropertyD 
> escriptor(ReflectionUtils.java:
> 1258)
>         at
> com.instantiations.designer.core.utils.reflect.ReflectionUtils.getPropertyD 
> escriptors(ReflectionUtils.java:
> 1200)
>         at
> com.instantiations.designer.core.model.description.rules.StandardBeanProper 
> tiesRule.begin(StandardBeanPropertiesRule.java:
> 37)
>         at org.apache.commons.digester.Digester.startElement(Digester.java:
> 1563)
>         at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(A 
> bstractSAXParser.java:
> 504)
>         at
> com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyE 
> lement(AbstractXMLDocumentParser.java:
> 182)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scan 
> StartElement(XMLDocumentFragmentScannerImpl.java:
> 1315)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
> $FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2723)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocu 
> mentScannerImpl.java:
> 624)
>         at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scan 
> Document(XMLDocumentFragmentScannerImpl.java:
> 486)
>         at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Co 
> nfiguration.java:
> 810)
>         at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Co 
> nfiguration.java:
> 740)
>         at
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:
> 110)
>         at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Abstract 
> SAXParser.java:
> 1208)
>         at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl
> $JAXPSAXParser.parse(SAXParserImpl.java:525)
>         at org.apache.commons.digester.Digester.parse(Digester.java:1887)
>         at
> com.instantiations.designer.core.model.description.helpers.ComponentDescrip 
> tionHelper.getDescription0(ComponentDescriptionHelper.java:
> 361)
>         at
> com.instantiations.designer.core.model.description.helpers.ComponentDescrip 
> tionHelper.getDescription0(ComponentDescriptionHelper.java:
> 266)
>         at
> com.instantiations.designer.core.model.description.helpers.ComponentDescrip 
> tionHelper.getDescription(ComponentDescriptionHelper.java:
> 236)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ComponentEntryI 
> nfo.ensureDescriptions(ComponentEntryInfo.java:
> 237)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ComponentEntryI 
> nfo.createTool(ComponentEntryInfo.java:
> 362)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ToolEntryInfo
> $1.runObject(ToolEntryInfo.java:28)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ToolEntryInfo
> $1.runObject(ToolEntryInfo.java:1)
>         at
> com.instantiations.designer.core.utils.execution.ExecutionUtils.runObjectLo 
> g(ExecutionUtils.java:
> 268)
>         at
> com.instantiations.designer.core.editor.palette.model.entry.ToolEntryInfo.a 
> ctivate(ToolEntryInfo.java:
> 23)
>         at com.instantiations.designer.core.editor.palette.DesignerPalette
> $3.activate(DesignerPalette.java:253)
>         at
> com.instantiations.designer.core.controls.palette.PaletteComposite.selectEn 
> try(PaletteComposite.java:
> 206)
>         at com.instantiations.designer.core.controls.palette.PaletteComposite
> $EntryFigure$1.mouseUp(PaletteComposite.java:726)
>         at com.instantiations.draw2d.EventManager
> $2.invokeListener(EventManager.java:217)
>         at com.instantiations.draw2d.EventManager.sendEvent(EventManager.java:
> 177)
>         at
> com.instantiations.draw2d.EventManager.handleMouseEvent(EventManager.java:
> 164)
>         at com.instantiations.draw2d.EventManager.mouseUp(EventManager.java:
> 155)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 57)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp 
> l.java:
> 43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at com.instantiations.draw2d.EventManager$8.invoke(EventManager.java:
> 288)
>         at $Proxy1.mouseUp(Unknown Source)
>         at
> org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
> 213)
>         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:
> 3540)
>         at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)
>         at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:
> 2640)
>         at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
>         at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
>         at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
>         at
> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:
> 332)
>         at
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:
> 664)
>         at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:
> 149)
>         at
> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication 
> .java:
> 115)
>         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(EclipseA 
> ppLauncher.java:
> 79)
>         at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
> 369)
>         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(DelegatingMethodAccessorImp 
> l.java:
> 43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
>         at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
>         at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
> Caused by: java.beans.IntrospectionException: type mismatch between
> read and write methods
>         at
> java.beans.PropertyDescriptor.findPropertyType(PropertyDescriptor.java:
> 657)
>         at
> java.beans.PropertyDescriptor.setWriteMethod(PropertyDescriptor.java:
> 318)
>         at java.beans.PropertyDescriptor.<init>(PropertyDescriptor.java:140)
>         at
> com.instantiations.designer.core.utils.reflect.ReflectionUtils.addPropertyD 
> escriptor(ReflectionUtils.java:
> 1256)
>         ... 62 more
>
> Some System Details:
> OS Name:        Linux
> OS Arch:        i386
> OS Version:     2.6.18-194.17.1.el5
> Linux Description:      CentOS release 5.5 (Final) Linux version
> 2.6.18-194.17.1.el5 ([email protected]) (gcc version
> 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Wed Sep 29 12:51:33 EDT 2010
> CentOS release 5.5 (Final) Kernel \r on an \m
>
> Java Vendor:    Sun Microsystems Inc.
> Java Version:   1.6.0_0
>
> Eclipse Version:        3.6.0.v20100505
> Eclipse Build Name:
> Eclipse Build ID:       M20100909-0800
> IDE Name:       Eclipse
> IDE Version:    1.3.1.20100913-1228
> IDE NL: en_US
>
> I have tried installing GWT on another linux machine with a similar
> configuration and simalr eclipse settings and encounter exactly the
> same error.
>
> Another user seems to have encountered a similar error 
> here:http://webcache.googleusercontent.com/search?q=cache:Wk4pDQGBhnIJ:com...
>
> Thanks for throwing any light on this issue,
>
> Meeta Krishnamurthi

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