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https://issues.apache.org/jira/browse/LUCENE-6001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14339958#comment-14339958
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Michael McCandless commented on LUCENE-6001:
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Thanks jane, patch looks great! You just moved the .cost() calls up before any
.nextDoc()s. I'll commit shortly.
It's nice that we "accidentally" fixed this in trunk ... I think we should also
fix this for 4.10.4.
> DrillSideways throws NullPointerException for some searches
> -----------------------------------------------------------
>
> Key: LUCENE-6001
> URL: https://issues.apache.org/jira/browse/LUCENE-6001
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/facet
> Affects Versions: 4.10.1
> Reporter: Dragan Jotanovic
> Attachments: LUCENE-6001.patch
>
>
> For some DrillSideways searches I get NullPointerException.
> I have tracked the problem to DrillSidewaysScorer class, on line 126 in
> DrillSidewaysScorer.java:
> long baseQueryCost = baseScorer.cost();
> On some of my index segments, this call throws NullPoinerException.
> "baseScorer" is instance of ReqExclScorer.
> In ReqExclScorer.java:
> public long cost() {
> return reqScorer.cost();
> }
> throws NullPointerException because reqScorer is null.
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