Simon Willnauer created LUCENE-5182:
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Summary: FVH can end in very very long running recursion on phrase
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Key: LUCENE-5182
URL: https://issues.apache.org/jira/browse/LUCENE-5182
Project: Lucene - Core
Issue Type: Bug
Affects Versions: 4.4, 5.0
Reporter: Simon Willnauer
Assignee: Simon Willnauer
Fix For: 5.0, 4.5
due to the nature of FVH extract logic a simple phrase query can put a FHV into
a super long running recursion. I had documents taking literally days to return
form the extract phrases logic. I have a test that reproduces the problem and a
possible fix. The reason for this is that the FVH never tries to early
terminate if a phrase is already way beyond the slop coming from the phrase
query. If there is a document with lot of occurrences or two or more terms in
the phrase this literally tries to match all possible combinations of the terms
in the doc.
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