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

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

     [ https://issues.apache.org/jira/browse/LUCENE-5182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Simon Willnauer resolved LUCENE-5182.
-------------------------------------

    Resolution: Fixed

I committed to trunk and 4x - really I want to get LUCENE-2878 in soon (will start working on it in the near future) and then re-visit all the highlighters
                
> 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: 5.0, 4.4
>            Reporter: Simon Willnauer
>            Assignee: Simon Willnauer
>             Fix For: 5.0, 4.5
>
>         Attachments: LUCENE-5182.patch
>
>
> 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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