uwej711 opened a new pull request #930: SOLR-13823: ClassCastException while grouping with group.query URL: https://github.com/apache/lucene-solr/pull/930 # Description When grouping with group.query and returning the score there is a class cast exception in Grouping.CommandQuery # Solution This PR shows the issue with a failing test. The solution is to use the needed collector directly as it is available in CommandQuery and do not cast at all. Also you need to populate the scores. I will add another commit with these changes. # Tests I added a test to TestGroupingSearch.testGroupAPI that groups by query and returns the score. # Checklist Please review the following and check all that apply: - [x] I have reviewed the guidelines for [How to Contribute](https://wiki.apache.org/solr/HowToContribute) and my code conforms to the standards described there to the best of my ability. - [x] I have created a Jira issue and added the issue ID to my pull request title. - [x] I am authorized to contribute this code to the ASF and have removed any code I do not have a license to distribute. - [ ] I have given Solr maintainers [access](https://help.github.com/en/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork) to contribute to my PR branch. (optional but recommended) - [ ] I have developed this patch against the `master` branch. - [x] I have run `ant precommit` and the appropriate test suite. - [x] I have added tests for my changes. - [ ] I have added documentation for the [Ref Guide](https://github.com/apache/lucene-solr/tree/master/solr/solr-ref-guide) (for Solr changes only).
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