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Q: 

When is a context class loader ever used?

Apart from JNDI, is there any real use for a context class loader? Is there any real NEED for a context class loader?

If I fail to set the context class loader, what will break?

Yes, I know that magic Java services mechanism with the file in /META-INF/ will break, but I think that's poor design, so it deserves to break... anything else?

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