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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-4971) NPE in AnalyzingSuggester
Date Wed, 01 May 2013 20:00:16 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless updated LUCENE-4971:
---------------------------------------

    Attachment: LUCENE-4971.patch

Patch with a test case showing the NPE.

The question is how to fix it ... SpecialOperations.getFiniteStrings today returns null when
it hits the limit, yet, it has accumulated the first N strings it saw at that point, so maybe
we should change it to return the first N so that we have something to build?

Or alternatively, AnalyzingSuggester could just skip a given input if it created too many
strings.
                
> NPE in AnalyzingSuggester
> -------------------------
>
>                 Key: LUCENE-4971
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4971
>             Project: Lucene - Core
>          Issue Type: Bug
>    Affects Versions: 4.1
>         Environment: Windows 7
>            Reporter: Alexey Kudinov
>            Assignee: Michael McCandless
>             Fix For: 5.0, 4.4
>
>         Attachments: LUCENE-4971.patch
>
>
> Setting maxGraphExpansions > 0 with a lot of expansions (e.g. due to synonyms).
> Set<IntsRef> paths = toFiniteStrings(surfaceForm, ts2a);
> paths may be null, so maxAnalyzedPathsForOneInput = Math.max(maxAnalyzedPathsForOneInput,
paths.size()) may end with NPE

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