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Migration from Tomcat 7 to 8: WARN ...Failed to scan from classloader hierarchy  RSS feed

 
David Schreck
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Hello,

We uses an embedded Tomcat in our application when migrating from Tomcat 7 to Tomcat 8.5.3, these kind of lines appears in the log file.
This doesn't seem to prevent Tomcat from starting but I wonder what can cause this:



Any ideas ?

Thanks !

David

 
Tim Holloway
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Welcome to the JavaRanch, David!

This is a rather odd path and doubly so because I'm pretty sure that jaxb-impl is part of the JDK itself, so it shouldn't be looking at an independent path.

What I suspect is that one of the components in your webapp has this in its manifest. Someone recently had the same sort of problem you are having and the cause appears to be that Tomcat 8 is attempting to resolve references by using that sort of data and Tomcat 7 did not. Which, technically appears to be a bug of sorts (incomplete feature) in Tomcat 7.

I recommend that you scan your WAR(s) and see if you can backtrack this path reference.
 
David Schreck
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Hi Tim,

Thank you for your quick answer !
We will have a look.

Br,

David
 
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