[GitHub] [lucene-solr] uwej711 opened a new pull request #943: SOLR-13823: ClassCastException while grouping with group.query (master)

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uwej711 opened a new pull request #943: SOLR-13823: ClassCastException while grouping with group.query (master)
URL: https://github.com/apache/lucene-solr/pull/943
 
 
   # Description
   
   When grouping with group.query and returning the score there is a class cast exception in Grouping.CommandQuery
   
   # Solution
   
   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. 
   
   # Tests
   
   I added a test to TestGroupingSearch.testGroupAPI that groups by query and returns the score. There is also a distributed group test.
   
   # 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)
   - [x] 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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