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From "Joel Bernstein (JIRA)" <>
Subject [jira] [Commented] (SOLR-7798) Improve robustness of ExpandComponent
Date Thu, 22 Feb 2018 00:30:00 GMT


Joel Bernstein commented on SOLR-7798:

Thanks for the patch. If you can setup a pull request I should have time to review and commit
when its ready.

> Improve robustness of ExpandComponent
> -------------------------------------
>                 Key: SOLR-7798
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: SearchComponents - other
>            Reporter: Jörg Rathlev
>            Assignee: Joel Bernstein
>            Priority: Minor
>         Attachments: expand-component.patch, expand-npe.patch
> The {{ExpandComponent}} causes a {{NullPointerException}} if accidentally used without
prior collapsing of results.
> If there are multiple documents in the result which have the same term value in the expand
field, the size of the {{ordBytes}}/{{groupSet}} differs from the {{count}} value, and the
{{getGroupQuery}} method creates an incompletely filled {{bytesRef}} array, which later causes
a {{NullPointerException}} when trying to sort the terms.
> The attached patch extends the test to demonstrate the error, and modifies the {{getGroupQuery}}
methods to create the array based on the size of the input maps.

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