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From "Digy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENENET-394) AnonymousClassScoreDocComparator throws nullreferenceexception
Date Fri, 11 Feb 2011 22:34:57 GMT

    [ https://issues.apache.org/jira/browse/LUCENENET-394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12993738#comment-12993738
] 

Digy commented on LUCENENET-394:
--------------------------------

First of all, JIRA is not the right place to ask question. It is an issue/bug tracking system.
Please use mailing lists for your questions.
Second, I was not able to regenerate your case. A *small and self-contained* test case would
be useful.
Third, please upgrade to 2.9.2 and make your test against it. Because I don't think that a
fix for v2.4 will be available.

DIGY

> AnonymousClassScoreDocComparator throws nullreferenceexception
> --------------------------------------------------------------
>
>                 Key: LUCENENET-394
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-394
>             Project: Lucene.Net
>          Issue Type: Bug
>         Environment: Lucene.NET 2.4.0.2
>            Reporter: Jaap Taal
>            Priority: Blocker
>              Labels: exception, fieldcache, sort,
>
> I've added a field to my index (Store.NO, Index.UN_TOKENIZED), I've updated a couple
of my documents and I'm now sorting on it (after I collected document id's in a HitCollector).
My search results in some documents that consist of document with the field and without.
> I use a simple implementation of SortComparator which implements GetComparable by just
returning the passed termtext.
> I've set a breakpoint at my GetComparable method and I see the correct values (the method
is NOT called for documents that don't have the field as a value).
> When SortComparer.Compare is called, a NullReferenceException occurs in:
> {code}
> public virtual int Compare(ScoreDoc i, ScoreDoc j)
> {
>     return this.cachedValues[i.doc].CompareTo(this.cachedValues[j.doc]);
> }
> {code}
> The expression this.cachedValues[i.doc] is null.
> Is this a limitation of SortComparer (and its AnonymousClassScoreDocComparator) that
all documents in a searchresult need to have a value for the field??

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