Github user merrimanr commented on the issue: https://github.com/apache/incubator-metron/pull/316 Finally figured this one out. I wasn't able to reproduce the issue because my maven version was a couple minor releases behind (on 3.3.9 now for what it's worth). Once I got past that the problem was obvious: metron-common was bringing in shaded org.reflections classes directly and regular org.reflections classes transitively which are not compatible because guava is rewritten in the shaded classes, hence the NoSuchMethodError. So for now the fix is to exclude org.reflections from the metron-common dependency and only depend on the shaded version. I had to merge several commits in so I'm still testing for regressions but this issue should be resolved.
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