Github user HeartSaVioR commented on the issue:
https://github.com/apache/storm/pull/1480
We're shading the libraries which you're changing scope to `provided` in
storm-core, so it will not be provided at runtime.
Since storm-redis depends on Guava, placing uber storm-redis jar to extlib
incurs dependency issue in whole topologies in cluster. If we still really want
to place this to extlib, we may need to consider shading guava and others for
storm-redis module.
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