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From Hans Lund <>
Subject FieldCache missing values?
Date Wed, 16 Dec 2015 14:01:48 GMT
In an attempt to make some backwards compatibilities (to a lucene 4.7 java
6) we would like to create a custom comparator that will parse a term field
and make the sort based on some inner properties of that field.

Started out with an implementation for FieldComparator the loaded
BinaryDocValues using


This works pretty well (not that slow) but for some reason every now and
that (having figured out the triggering conditions) - the BinaryDocValues
map ByteRefs that fails to point to the actual term (ByteRefs is empty).
This can be avoided in tests by calling purgeAllCaches on default before
the getTerms() - hmm

If we load the SortedSetDocValues with

FieldCache.DEFAULT.getDocTermOrds(arc.reader(), FIELD);

no unexplained empty values have been observed (but loading the actual term
form here is not quite in scope for the set and is quite slow)

Any thoughts on what when its ok to call  FieldCache.DEFAULT.getTerms? - Or
is this not really in any use anymore?

Regards Hans Lund

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