I'm hoping to find some information about using "ADD FILES <PATH>" when using 
the spark execution engine.  I've seen some jira tickets reference this 
functionality, but little else.  We have written some custom UDFs which require 
some external resources.  When using the MR execution engine, we can reference 
the file paths using a relative path and they are properly distributed and 
resolved.  When I try to do the same under spark engine, I receive an error 
saying the file is unavailable.

Does "ADD FILES <PATH>" work on spark, and if so, how should I properly 
reference those files in order to read them in the executors?

Thanks much for your help,

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