Can't load new UI after installing an internal feature

Hi

I’m trying to finally allow internal users to properly use the new UI when our internal nodes are installed.

In KNIME 5.2 and 5.3 we just get a blank screen when switching to the new UI. I’ve done some debugging and found that we’re getting an exception thrown when it tries to load one of our internal nodes, instead of just breaking the node tree like it used to the entire frontend doesn’t load now :D.

I’m trying to fix the node but I’m having trouble identifying how I’ve caused the issue.

I’ve check out the knime-workbench git repo and added some extra error handling to try get some more information, but all I’ve got is a longer stack trace

java.lang.ClassCastException: class org.lhasalimited.xxx.xxxReaderNodeFactory cannot be cast to class org.knime.core.node.ConfigurableNodeFactory ( org.lhasalimited.xxx.xxxReaderNodeFactory is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @f105010; org.knime.core.node.ConfigurableNodeFactory is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @2e90ffea)
	at org.knime.workbench.repository.util.ConfigurableNodeFactoryMapper.<clinit>(ConfigurableNodeFactoryMapper.java:92)
	at org.knime.workbench.explorer.view.AbstractContentProvider.getWorkspaceImage(AbstractContentProvider.java:1322)
	at org.knime.workbench.explorer.localworkspace.LocalWorkspaceContentProvider.getImage(LocalWorkspaceContentProvider.java:249)
	at org.knime.workbench.explorer.view.ContentDelegator.getImage(ContentDelegator.java:467)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getImage(WrappedViewerLabelProvider.java:101)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:146)
	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:149)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:973)
	at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:131)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)

The error starts from ConfigurableNodeFactoryMapper

This exception type isn’t caught by the catch

} catch (InvalidRegistryObjectException | CoreException e) {
                LOGGER.error("File extension handler from contributor \"" + element.getContributor().getName()
                    + "\" doesn't properly load -- ignoring it.", e);
            } 

Extending the catch to also catch this means the front end does load (though presumably with some missing functionality).

I’m going to keep debugging but thought I’d raise a post now in case there’s any tips on what to be checking :).

Cheers

Sam

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