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https://issues.apache.org/jira/browse/SOLR-6029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13983972#comment-13983972
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Joel Bernstein commented on SOLR-6029:
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Thanks Greg, this is a nasty bug.
> CollapsingQParserPlugin throws ArrayIndexOutOfBoundsException if elevated doc
> has been deleted from a segment
> -------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-6029
> URL: https://issues.apache.org/jira/browse/SOLR-6029
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Affects Versions: 4.7.1
> Reporter: Greg Harris
> Priority: Minor
> Attachments: SOLR-6029.patch
>
>
> CollapsingQParserPlugin misidentifies if a document is not found in a segment
> if the docid previously existed in a segment ie.... was deleted.
> Relevant code bit from CollapsingQParserPlugin needs to be changed from:
> -if(doc != -1) {
> +if((doc != -1) && (doc != DocsEnum.NO_MORE_DOCS)) {
> What happens is if the doc is not found the returned value is
> DocsEnum.NO_MORE_DOCS. This would then get set in the fq bitSet array as the
> doc location causing an ArrayIndexOutOfBoundsException as the array is only
> as big as maxDocs.
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