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Couldn't retain the state of InternalPlatform while using stop() and start() [message #1814737]

Tue, 17 September 2019 05:14

Eclipse User

Hi,

We are using stop() and start() methods of InternalPlatform class of eclipse.core.internal.runtime package.

Basically, we need to reset initialized flag for platform, then instantiate some classes and set the flag again.
We are getting NullPointerException while using createResource() in ExtendedResourceSet interface of eclipse.sphinx.emf.resource package.

Below is the trace,

NullPointerException occurred when invoking code from unknown plug-in: null.
java.lang.NullPointerException
at org.eclipse.sphinx.emf.resource.ResourceHandlerRegistry.readRegistry(ResourceHandlerRegistry.java:61)
at org.eclipse.sphinx.emf.resource.ResourceHandlerRegistry.init(ResourceHandlerRegistry.java:54)
at org.eclipse.sphinx.emf.resource.ResourceHandlerRegistry.getDescriptors(ResourceHandlerRegistry.java:84)
at org.eclipse.sphinx.emf.resource.ResourceHandlerRegistry.getHandler(ResourceHandlerRegistry.java:98)
at org.artop.aal.common.resource.impl.AutosarResourceFactoryImpl.installResourceHandler(AutosarResourceFactoryImpl.java:306)
at org.artop.aal.common.resource.impl.AutosarResourceFactoryImpl.initResource(AutosarResourceFactoryImpl.java:172)
at autosar40.util.Autosar40ResourceFactoryImpl.createResource(Autosar40ResourceFactoryImpl.java:121)
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.createResource(ResourceSetImpl.java:434)
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.createResource(ResourceSetImpl.java:423)
at models.AutosarFile.createFile(AutosarFile.java:63)

Note : we are using some AUTOSAR jars which interacts with emf packages.

Re: Couldn't retain the state of InternalPlatform while using stop() and start() [message #1814775 is a reply to message #1814737]

Tue, 17 September 2019 16:37

Eclipse User

I don't see JDT in this, perhaps this is an EMF question?
Or is ExtendedResourceSet so specific that only sphinx experts can answer?

Re: Couldn't retain the state of InternalPlatform while using stop() and start() [message #1814779 is a reply to message #1814775]

Tue, 17 September 2019 23:48

Eclipse User

This seems more of a Sphinx question. That project doesn't seem very active:

https://git.eclipse.org/c/sphinx/org.eclipse.sphinx.git/log/
https://www.eclipse.org/forums/index.php?t=thread&frm_id=171

Also, your stack trace doesn't seem very complete. It appears to croak here:

https://git.eclipse.org/c/sphinx/org.eclipse.sphinx.git/tree/plugins/org.eclipse.sphinx.emf/src/org/eclipse/sphinx/emf/resource/ResourceHandlerRegistry.java#n61

It's impossible to say why org.eclipse.sphinx.emf.Activator.getActivator() would return null. Perhaps this is being called during stop() and that method returns null at that point.

Best to use the debugger and to ask on the Sphinx forum. But if you want a fix, likely you'll need to participate as a committer or sponsor someone to do the work.

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