Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/3800
@greghogan I think we should keep the `force-shading` approach to have
every project pass through the shade plugin, for various reasons. Resolving
variables (as required here) is one of them, but filtering of configuration
files, signature files, etc. are also very good reasons. Also, there may be
"single use" shaded dependencies in non-scala projects, which could still be
shaded on the fly in the using project directly (netty in flink-runtime would
be such a case).
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