Question

When I double-click on my tomcat server on eclipse’s “Servers” tab I get taken to the propeties page. This page has only one tab, “Overview” and has a red square as its icon. When I click on the “Open launch configuration” link on the “Overview” tab I get two popup messages:

Exception occurred creating launch configuration tabs
Reason:
No tab group defined for launch configuration type org.eclipse.jst.server.tomcat.core.launchConfigurationType

And:

No tabs defined for launch configuration type Apache Tomcat

Eclipse’s “Error Log” tab has:

eclipse.buildId=M20090917-0800
java.version=1.6.0_17
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_GB
Framework arguments:  -product org.eclipse.epp.package.java.product
Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.java.product -data C:\devsrc

Error
Mon Jan 18 13:38:01 GMT 2010
Unhandled event loop exception
java.lang.NullPointerException
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager.filterLaunchDelegates(LaunchConfigurationManager.java:267)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.hasMultipleDelegates(LaunchConfigurationTabGroupViewer.java:1138)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.hasDuplicateDelegates(LaunchConfigurationTabGroupViewer.java:1121)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.getErrorMesssage(LaunchConfigurationTabGroupViewer.java:1163)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.updateMessage(LaunchConfigurationsDialog.java:1433)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.refreshStatus(LaunchConfigurationsDialog.java:1159)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.refreshStatus(LaunchConfigurationTabGroupViewer.java:989)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer$8.run(LaunchConfigurationTabGroupViewer.java:692)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.inputChanged(LaunchConfigurationTabGroupViewer.java:697)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.setInput0(LaunchConfigurationTabGroupViewer.java:659)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationTabGroupViewer.setInput(LaunchConfigurationTabGroupViewer.java:635)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationPropertiesDialog.initializeContent(LaunchConfigurationPropertiesDialog.java:126)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.createContents(LaunchConfigurationsDialog.java:425)
    at org.eclipse.jface.window.Window.create(Window.java:431)
    at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1089)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.create(LaunchConfigurationsDialog.java:354)
    at org.eclipse.jface.window.Window.open(Window.java:790)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.open(LaunchConfigurationsDialog.java:1064)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationPropertiesDialog.open(LaunchConfigurationPropertiesDialog.java:227)
    at org.eclipse.debug.ui.DebugUITools.openLaunchConfigurationPropertiesDialog(DebugUITools.java:448)
    at org.eclipse.debug.ui.DebugUITools.openLaunchConfigurationPropertiesDialog(DebugUITools.java:425)
    at org.eclipse.wst.server.ui.internal.editor.OverviewEditorPart$9.linkActivated(OverviewEditorPart.java:578)
    at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleActivate(AbstractHyperlink.java:233)
    at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleMouseUp(AbstractHyperlink.java:327)
    at org.eclipse.ui.forms.widgets.AbstractHyperlink.access$2(AbstractHyperlink.java:311)
    at org.eclipse.ui.forms.widgets.AbstractHyperlink$4.handleEvent(AbstractHyperlink.java:125)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3880)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3473)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
    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:368)
    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:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1287)

What can I do to get it to work?

Thanks…

Answer 1

Looks like an installation issue.

Try a new installation of WTP on a clean eclipse (that you can unzip anywhere you want, in order to not mess with your current eclipse installation).

As mentioned in the WTP download page, you can try their update site with the p2 update process.

If you are just getting started with Eclipse or Eclipse Web Tools, you may want to first install from the Galileo update site, as it would have everything you need to get started.

This Web Tools Platform update site does assume you have all the pre-reqs installed.