[LUCENE-7749] IndexOrDocValuesQuery not working with LRUQueryCache (?)

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 6.5.1, 6.6, 7.0
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Martin Amirault
• Created: 21/Mar/17 09:41
• Updated: 28/Aug/22 15:12
• Resolved: 03/Apr/17 14:20

Description

I was experimenting with 6.5.0-SNAPSHOT and could not see any performance improvement using the new IndexOrDocValuesQuery where I would have expected some.
I am using a basic FILTER query (term + point/dv range), along with IndexSearcher#search.
Looking at the stack trace it seems that LRUQueryCache#CachingWrapperWeight not delegating the scorerSupplier method is the reason.

Maybe it is on purpose for the result to be cacheable ? Does that mean IndexOrDocValuesQuery is not useable with the default IndexSearcher cache ? (Or maybe am I just completely misusing the IndexOrDocValuesQuery feature ?)

Here is a thread dump of the call to IndexOrDocValuesQuery#scorerSupplier

at org.apache.lucene.search.IndexOrDocValuesQuery$1.scorerSupplier(IndexOrDocValuesQuery.java:148)
at org.apache.lucene.search.IndexOrDocValuesQuery$1.scorer(IndexOrDocValuesQuery.java:168)
at org.apache.lucene.search.LRUQueryCache$CachingWrapperWeight.scorer(LRUQueryCache.java:746)
at org.apache.lucene.search.Weight.scorerSupplier(Weight.java:126)
at org.apache.lucene.search.BooleanWeight.scorerSupplier(BooleanWeight.java:400)
at org.apache.lucene.search.BooleanWeight.scorer(BooleanWeight.java:381)
at org.apache.lucene.search.Weight.bulkScorer(Weight.java:160)
at org.apache.lucene.search.BooleanWeight.bulkScorer(BooleanWeight.java:375)
at org.apache.lucene.search.LRUQueryCache$CachingWrapperWeight.cache(LRUQueryCache.java:704)
at org.apache.lucene.search.LRUQueryCache$CachingWrapperWeight.bulkScorer(LRUQueryCache.java:787)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:666)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:473)