Eclipse RCP application/product could not correctly run

Question

I have an Eclipse RCP application, which has 2 parts, cdt extension and GMF extension,

1. I create an product configuration, uses application="org.eclipse.ui.ide.workbench" with no problems but there are more unexpected menus shown,

2. so I have to use application="com.x.y.z.branding/myown.product" it gives me below errors, even I can use the started application, but creating modeling project doesn't show on modeler explorer.

please help,

java.lang.NullPointerException
    at org.eclipse.sirius.server.ui.autostart.internal.SiriusServerStartup.lambda$2(SiriusServerStartup.java:98)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4034)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3701)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
    at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
    at com.x.y.z.branding.Application.start(Application.java:33)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1472)

Answer 1

The error looks like Eclipse Sirius bug 536894. The bug report says

• The server auto-start feature and plug-ins do not depend on the server itself, so it is possible to have the auto-start plug-in installed without the server, which triggers the NPE.

• The auto-start feature's description does not clearly mark it as experimental, so users may want to install it "just to see", and then get the NPE.

So you probably need to update the list of plugins in the RCP to include the server.