Github user justinleet commented on the issue:
https://github.com/apache/metron/pull/995
An interesting consequence of not using docValues is
https://lucene.apache.org/solr/guide/6_6/docvalues.html#DocValues-RetrievingDocValuesDuringSearch
>When useDocValuesAsStored="false", non-stored DocValues fields can still
be explicitly requested by name in the fl param, but will not match glob
patterns ("*").
This sounds more like what we want, right? From my selfish metaalerts
perspective. Why should be be returning the subfields of polyfields to the
user? My concerns are more around if this causes perf problems around sorting
those fields.
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