I have a system that automatically generate span queries to Lucene. Sometimes,
the system generates a query like this one which always throws a
RuntimeException:
spanNear([spanNear([text:interesting], 3, true), spanNear([text:interesting,
text:john, text:said], 8, true)], 2, true)
Basically, the system is looking for a document that contains a string sequence
"interesting .... interesting john said". The thrown exception is as follows:
java.lang.RuntimeException: Unexpected: ordered
at
org.apache.lucene.search.spans.NearSpans.firstNonOrderedNextToPartialList(Unknown
Source)
at org.apache.lucene.search.spans.NearSpans.next(Unknown Source)
at org.apache.lucene.search.spans.SpanScorer.next(Unknown Source)
at org.apache.lucene.search.Scorer.score(Unknown Source)
at org.apache.lucene.search.IndexSearcher.search(Unknown Source)
My question is, what does is this "Unexpected: ordered" mean? and is there
anyway I can avoid these exceptions?
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