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

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 8.4.1, 8.10.1, 8.11.1
• Component/s: SolrCloud, SolrJ
• Assignee: Unassigned
• Reporter: Øystein Johnsen Veinan
• Created: 28/Apr/22 07:56
• Updated: 12/May/22 00:35

Description

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.

Issue Links

• is related to: SOLR-12457 field(x,min|max) sorting doesn't work on trie or str fields in multi-shard collections
• links to: GitHub Pull Request #827