Eclipse Annoyance - Failures with Plugin Development using Eclipse 3.1

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I'm a big Eclipse fan, and have been since version 2. I've been working steadily with Eclipse 3.1 since milestone 5. Right now I'm up to release candidate 2. I've been quite happy with the changes, in particular the increases in performance on both Windows and Linux. But one thing I have not been happy about is the apparent breakage in plugin development.

One excellent feature of Eclipse is its deep support for Eclipse plugin development through its plugin development environment (PDE). By following along with the excellent wizards, you can quickly build a framework for plugin development that is capable of being immediately launched. At least that's the way it worked until the first release candidate (RC1). Starting with RC1, I noticed that my older plugin development project suddenly failed to work. I quickly decided to create a simple plugin project using Hello World and then compare the two, looking to see what had changed between 3.0 and 3.1 RC1. But that didn't work either. No matter what I do, I cannot create a plugin that works. Every time I go to launch the plugin I get the following failure message:


!SESSION 2005-06-17 09:20:04.116 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.5.0_03
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments: -application org.eclipse.ui.ide.workbench -pdelaunch
Command-line arguments: -application org.eclipse.ui.ide.workbench -data C:\Documents and Settings\beebew\runtime-workspace -dev file:C:/Documents and Settings/beebew/workspace/.metadata/.plugins/org.eclipse.pde.core/Favorites/dev.properties -pdelaunch -os win32 -ws win32 -arch x86

!ENTRY org.eclipse.osgi 2005-06-17 09:20:06.400
!MESSAGE An error occurred while automatically activating bundle org.eclipse.ui.workbench (178).
!STACK 0
org.osgi.framework.BundleException: The activator org.eclipse.ui.internal.WorkbenchPlugin for bundle org.eclipse.ui.workbench is invalid
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:151)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start( BundleContextImpl.java:965)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker( BundleHost.java:321)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start( AbstractBundle.java:266)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:112)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.SingleSourcePackage.loadClass( SingleSourcePackage.java:37)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:386)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.defineClass( DefaultClassLoader.java:370)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass( EclipseClassLoader.java:223)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClassImpl( DefaultClassLoader.java:343)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClass( DefaultClassLoader.java:235)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.findLocalClass( AbstractClassLoader.java:183)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.basicFindLocalClass( EclipseClassLoader.java:137)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:78)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:144)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start( BundleContextImpl.java:965)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker( BundleHost.java:321)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start( AbstractBundle.java:266)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:112)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass( AbstractBundle.java:1259)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension( ConfigurationElementHandle.java:48)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run( PlatformActivator.java:222)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)
Caused by: java.lang.NoClassDefFoundError: org/eclipse/swt/SWTError
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2328)
at java.lang.Class.getConstructor0(Class.java:2640)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:146)
... 55 more
Root exception:
java.lang.NoClassDefFoundError: org/eclipse/swt/SWTError
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2328)
at java.lang.Class.getConstructor0(Class.java:2640)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:146)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start( BundleContextImpl.java:965)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker( BundleHost.java:321)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start( AbstractBundle.java:266)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:112)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.SingleSourcePackage.loadClass( SingleSourcePackage.java:37)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:386)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.defineClass( DefaultClassLoader.java:370)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass( EclipseClassLoader.java:223)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClassImpl( DefaultClassLoader.java:343)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClass( DefaultClassLoader.java:235)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.findLocalClass( AbstractClassLoader.java:183)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.basicFindLocalClass( EclipseClassLoader.java:137)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:78)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:144)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start( BundleContextImpl.java:965)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker( BundleHost.java:321)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start( AbstractBundle.java:266)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:112)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass( AbstractBundle.java:1259)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension( ConfigurationElementHandle.java:48)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:222)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

!ENTRY org.eclipse.osgi 2005-06-17 09:20:06.430
!MESSAGE An error occurred while automatically activating bundle org.eclipse.ui.ide (173).
!STACK 0
org.osgi.framework.BundleException: The activator org.eclipse.ui.internal.ide.IDEWorkbenchPlugin for bundle org.eclipse.ui.ide is invalid
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:151)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start( BundleContextImpl.java:965)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker( BundleHost.java:321)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start( AbstractBundle.java:266)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:112)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass( AbstractBundle.java:1259)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension( ConfigurationElementHandle.java:48)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run( PlatformActivator.java:222)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)
Caused by: java.lang.NoClassDefFoundError: org/eclipse/ui/plugin/AbstractUIPlugin
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.defineClass( DefaultClassLoader.java:370)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass( EclipseClassLoader.java:223)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClassImpl( DefaultClassLoader.java:343)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClass( DefaultClassLoader.java:235)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.findLocalClass( AbstractClassLoader.java:183)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.basicFindLocalClass( EclipseClassLoader.java:137)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:78)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:144)
... 27 more
Root exception:
java.lang.NoClassDefFoundError: org/eclipse/ui/plugin/AbstractUIPlugin
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.defineClass( DefaultClassLoader.java:370)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass( EclipseClassLoader.java:223)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClassImpl( DefaultClassLoader.java:343)
at org.eclipse.osgi.framework.adaptor.core.DefaultClassLoader.findClass( DefaultClassLoader.java:235)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.findLocalClass( AbstractClassLoader.java:183)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.basicFindLocalClass( EclipseClassLoader.java:137)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:78)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator( AbstractBundle.java:144)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start( BundleContextImpl.java:965)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker( BundleHost.java:321)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start( AbstractBundle.java:266)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass( EclipseClassLoader.java:112)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass( BundleLoader.java:337)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:389)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass( AbstractBundle.java:1259)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension( ConfigurationElementHandle.java:48)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run( PlatformActivator.java:222)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

!ENTRY org.eclipse.osgi 2005-06-17 09:20:06.440
!MESSAGE Application error
!STACK 1
org.eclipse.core.runtime.CoreException[1]: java.lang.ClassNotFoundException: org.eclipse.ui.internal.ide.IDEApplication
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:403)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass( BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass( AbstractClassLoader.java:78)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass( BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass( BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass( AbstractBundle.java:1259)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension( ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension( ConfigurationElementHandle.java:48)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:222)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)


One of the reasons I use Eclipse is its extensibility as well as its rich client platform (RCP) that allows the rapid creation of stand-alone applications. Both use the plugin architecture and supporting development tools, which currently appear to be broken. Release candidate 3 is coming out this weekend, and I'm going to check and see if this problem is addressed. But if it is not, then I'm going to seriously consider moving over full time to Netbeans. I've been living in both worlds as of late. As good as Netbeans has become (and it has become very, very good) I've been hesitant to move across because Eclipse as been as good if not better in some areas. But this is a major failure, especially in a release candidate, and it's a feature that's too important not to have in the final release. If Eclipse 3.1 hits the streets with this problem then I will make the official change to Netbeans. Netbeans still has some problems I'd like to see addressed, but it will improve over time.

Comments

  1. AnonymousAugust 14, 2005

    I came across this while trying to solve the very same problem on a linux box

    I am using the 3.1 final release. I use the "File->Export..." menu entry and then select "Eclipse Product".

    However after walking through the wizard I get a product that does not work. I keep getting the same SWTError class not found problem.

    If I look at the set of plugins copied across into my product: I get org.eclipse.swt_3.1.0.jar, but not org.eclipse.swt.gtk.linux.x86_3.1.0.jar. And it is the latter file that actually holds the SWTError class file.

    So the trick to make 3.1 products export correctly (at least on linux) is to also copy across the platform specific SWT file. You also have to edit <exported_product>/configuration/config.ini and put the platform jar file in the "osgi.bundles" entry. Then it will get picked up by the appropriate class loader.

    I hope that this helps.

    regards,
    Frugal

    ReplyDelete
  2. AnonymousSeptember 16, 2005

    I ran into this same problem on Mac OS X. I found what looks to be the right solution:

    - Click on "[productname].product"
    - Select the "Configuration" tab
    - Click "Add Required Plug-ins" button
    - Save and export

    This has the effect of adding the the correct swt jar as Frugal describes

    ReplyDelete

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Ten Reasons to Ignore Ten Reasons to Dump Windows and Use Linux

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There is a tradition amongst the hard-core Linux aficionados to extol Linux's various virtues as a list of 10 or more reasons to substitute (as in "dump") an existing Windows installation with Linux. There's no reason to point them all out; a simple Google search (" 10 reasons to use Linux ") will provide you with such lists stretching back through the years, as well as hours of entertainment. One very recent list caught my eye over the weekend, published by PCWorld. Their article, " Ten Reasons to Dump Windows and Use Linux ", seems to have hit a nerve with me. Normally I just ignore such journalistic pap, since the majority of it comes courtesy of one ill-informed blog or another (such as this one). But in this instance a "real" publication put some time and journalistic "credibility" into this list, which places it in front of a wider audience than the typical blog poist (again, such as this one). So let's consider al...
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Former Eclipse user re-evaluates Eclipse 3.3M5

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I've been using NetBeans for a while now, starting with version 4.2 in beta. One of NetBeans' key selling points (in my not-so-humble-opinion) is Java GUI building with Matisse . That feature continues to be quite powerful and unrivaled, especially for a free-as-in-beer IDE. I even wrote a lovely paean to the wonders of NetBeans and why I moved away away from Eclipse to NetBeans . Now, it looks like I may have to eat some of those tastefully written words. What you're looking at above is a complete Ruby on Rails project hosted and running within Eclipse 3.3 Milestone 5 on Windows XP. Milestone 5 was released this past Friday, February 9th. I installed it Saturday, and then went on a plugin hunt to fill out additional features and capabilities. Why did I decide to re-install Eclipse, especially a milestone? So that I could get a complete integrated development and test capability in one convenient package for Ruby on Rails. Like a lot of other folks I've been playing ...
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