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Exception starting sample application [message #1774141]

Wed, 11 October 2017 01:16

Marcelo Ruiz

Messages: 80
Registered: April 2017

Member

Hi,
My application does not start due to a NullPointerException. I though I broke things when trying to use the Reactor 3 library.
To be sure I did something wrong, I created a new application using the wizard and following the steps of Tutorial 4, where I edited the Application.e4xmi and added a trimmed window (defining its size and position on the screen) and added also an empty part.
To my surprise, I still get the same exception and the application does not start:

!ENTRY org.eclipse.equinox.app 4 0 2017-10-10 21:05:35.210
!MESSAGE Exception in Application start method
!STACK 0
java.lang.RuntimeException: Exception in Application start method
	at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
	at org.eclipse.fx.ui.workbench.base.internal.EFX_ResourceHandler.loadMostRecentModel(EFX_ResourceHandler.java:176)
	at org.eclipse.fx.ui.workbench.base.AbstractE4Application.loadApplicationModel(AbstractE4Application.java:422)
	at org.eclipse.fx.ui.workbench.base.AbstractE4Application.createE4Workbench(AbstractE4Application.java:267)
	at org.eclipse.fx.ui.workbench.fx.E4Application.initE4Workbench(E4Application.java:358)
	at org.eclipse.fx.ui.workbench.fx.E4Application$1.run(E4Application.java:215)
	at org.eclipse.fx.ui.workbench.fx.E4Application.jfxStart(E4Application.java:253)
	at org.eclipse.fx.ui.workbench.fx.DefaultJFXApp.start(DefaultJFXApp.java:57)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
	at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
	at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
	at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
	... 1 more

Any idea of what might be the cause for this? I thought this problem was caused by having Java 9 running on my system, but I uninstalled it and reinstalled Java 8 and it is still there.
Maybe a good addition to the sample app, will be to make it at least display an empty window without requiring the developer to touch anything. Once that window is displayed, proving the configuration is correct, development could start on a sound base.
Thanks!

[Updated on: Thu, 12 October 2017 16:23]

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Re: Exception starting sample application [message #1774317 is a reply to message #1774141]

Thu, 12 October 2017 18:28

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Is this on the nightly or 3.0.0?

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Re: Exception starting sample application [message #1774319 is a reply to message #1774317]

Thu, 12 October 2017 19:10

Marcelo Ruiz

Messages: 80
Registered: April 2017

Member

Hi Tom,

Thanks for your answer. It is happening in both.
This is what I found out:

EFX_ResourceHandler has a private variable:

private ResourceSetImpl resourceSetImpl;

that should be initialized in:

@PostConstruct
void init() {
	this.resourceSetImpl = new ResourceSetImpl();
        ....
}

but the method seems to be never called (I set a debug breakpoint there but it is never reached). So the execution of:

private Resource getResource(URI uri) throws Exception {
	Resource resource;
	if (this.saveAndRestore) {
		resource = this.resourceSetImpl.getResource(uri, true);   //NPE HERE
	} else {
		// Workaround for java.lang.IllegalStateException: No instance data can be specified
		// thrown by org.eclipse.core.internal.runtime.DataArea.assertLocationInitialized
		// The DataArea.assertLocationInitialized is called by ResourceSetImpl.getResource(URI,
		// boolean)
		resource = this.resourceSetImpl.createResource(uri);
		resource.load(new URL(uri.toString()).openStream(), this.resourceSetImpl.getLoadOptions());
	}

	return resource;
}

throws the NullPointerException.

I hope that information can give you a better hint of what might be going on.
Thanks!

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Re: Exception starting sample application [message #1774394 is a reply to message #1774319]

Fri, 13 October 2017 15:42

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

This sounds like you have multiple versions of javax.annotation in your runtime

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Re: Exception starting sample application [message #1795361 is a reply to message #1774394]

Thu, 20 September 2018 22:46

Henri Boucher

Messages: 56
Registered: September 2015

Member

I'm having the same problem (@PostConstruct not executed).
I suspect your diagnosis in the previous post applies, but I just don't know how to fix it.
I'm running Eclipse IDE Version: 2018-09 (4.9.0), fx runtime 3.4.0, and java version "1.8.0_171."
Would you please tell me how.
Thank-you.

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Re: Exception starting sample application [message #1795418 is a reply to message #1795361]

Fri, 21 September 2018 15:18

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

What javax.annotation bundle is loaded when you launch the osgi env?

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Re: Exception starting sample application [message #1795690 is a reply to message #1795418]

Wed, 26 September 2018 23:26

Henri Boucher

Messages: 56
Registered: September 2015

Member

Initially I was running a POJO, but I get the same result when it is run from a product "Launch an ecipse application." I don't see in either run configurations (including "show command line") any references to javax.annotation.

The eclipse platform plug-ins tab has
javax.annotation bundle 1.2.0v201602091430

How do I determine what bundles are loaded when launching? How can I add it for both cases?

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Re: Exception starting sample application [message #1795977 is a reply to message #1795690]

Wed, 03 October 2018 13:16

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Well you start with -console the important commands are: "ss" and "inspect"

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Re: Exception starting sample application [message #1796085 is a reply to message #1795977]

Thu, 04 October 2018 23:24

Henri Boucher

Messages: 56
Registered: September 2015

Member

Thanks Thomas. Here's what I get:

osgi> inspect bundle capability javax.annotation
javax.annotation_1.2.0.v201602091430 [5] is required by:
--------------------------------------------------------
Nothing
osgi> inspect bundle requirement javax.annotation 
javax.annotation_1.2.0.v201602091430 [5] requires bundles:
----------------------------------------------------------
osgi.wiring.bundle; bundle-version:Version="2.6.0.v201404270220"; osgi.wiring.bundle="org.apache.commons.lang"
osgi>

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