Github user nickwallen commented on the issue:
https://github.com/apache/incubator-metron/pull/233
Due to the static initialization and use of a singleton for the function
resolver, this was a bit difficult to trace. We should think about making this
easier to grok as a follow-on to this PR. This would be painful for a new user
creating their own functions. I don't personally have a solution right now,
but need to noodle on it.
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