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https://issues.apache.org/jira/browse/SOLR-14073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16994739#comment-16994739
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Joel Bernstein commented on SOLR-14073:
---------------------------------------

This is an untested patch. I'm going to do a whole lot of testing to see if 
this fully resolves issues with using CollapsingQParserPlugin twice in the same 
query.  

> Fix segment look ahead NPE in CollapsingQParserPlugin
> -----------------------------------------------------
>
>                 Key: SOLR-14073
>                 URL: https://issues.apache.org/jira/browse/SOLR-14073
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Joel Bernstein
>            Priority: Major
>         Attachments: SOLR-14073.patch
>
>
> The CollapsingQParserPlugin has a bug that if every segment is not visited 
> during the collect it throws an NPE. This causes the CollapsingQParserPlugin 
> to not work when used with any feature that short circuits the segments 
> during the collect. This includes using the CollapsingQParserPlugin twice in 
> the same query and the time limiting collector.



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