[jira] [Created] (SOLR-16172) Error when combining Grouping with Childfield sorting with more than one Shard

["Øystein Johnsen Veinan (Jira)" <ji...@apache.org>]

Øystein Johnsen Veinan created SOLR-16172:
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             Summary: Error when combining Grouping with Childfield sorting with more than one Shard 
                 Key: SOLR-16172
                 URL: https://issues.apache.org/jira/browse/SOLR-16172
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: SolrCloud, SolrJ
    Affects Versions: 8.11.1, 8.10.1, 8.4.1
            Reporter: Øystein Johnsen Veinan
         Attachments: SolrGroupError.zip, readme.txt

When combining Grouping with Childfield sorting with more than one Shard the following error occures:
*"Error from server at null: class java.lang.String cannot be cast to class org.apache.lucene.util.BytesRef (java.lang.String is in module java.base of loader 'bootstrap'; org.apache.lucene.util.BytesRef is in unnamed module of loader org.eclipse.jetty.webapp.WebAppClassLoader @180e6ac4)"*

To reproduce use the attached docker containers.
Check out the file Readme.txt

We believe that the error will occur in more than the affected versions. The attached docker-compose file contain the version 8.11.1.



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