Github user mmiklavc commented on the issue:

    https://github.com/apache/metron/pull/995
  
    @justinleet - Thanks for that write up - that helps considerably.
    
    Just to round out @merrimanr 's comment about polyfields:
    
    >At this point I question whether a field being a polyfield is causing this 
issue. The testing I've done does not support that. Javadocs for 
FieldType.isPolyField() state:
    
    >>A "polyField" is a FieldType that can produce more than one 
IndexableField instance for a single value
    
    So, from the last few examples discussed it suggests to me that being a 
polyfield *is* actually a problem, but it's only part of the total reason for 
the problem. Under the hood they are setting stored=false and docValues=false 
for currency and some of the other polyfields, whereas they aren't doing this 
for LatLonType and Point. Does that sound about right? I saw mention of Date 
also, and some comments about LatLonType being the only problem data type, so 
it would be good to summarize again what field types are specifically a problem.
    
    One bit I'm not completely clear on after the rounds of discussion is when 
it's desirable to return the dynamic/subfields generated by virtue of being a 
polyfield, and further how the doc update code is managing that differently 
from a normal search. For a standard doc query in context of performing an 
update, we don't want dynamically generated fields returned because that will 
bork the re-index. For a user glob query, we *do* want then returned because 
they may be useful to some users? Is that hovering around accurate?


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