[jira] [Created] (LUCENE-5182) FVH can end in very very long running recursion on phrase highlight

["Simon Willnauer (JIRA)" <ji...@apache.org>]

Simon Willnauer created LUCENE-5182:
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             Summary: FVH can end in very very long running recursion on phrase highlight
                 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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