[SOLR-12249] Better error message when grouping on a tokenized (non SortableText) field in SolrCloud

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 6.6.2, 8.0
• Fix Version/s: 8.2, 9.0
• Assignee: Erick Erickson
• Reporter: Erick Erickson
• Created: 20/Apr/18 03:40
• Updated: 26/Jul/19 08:56
• Resolved: 04/Jun/19 17:35

Description

I didn't test this with master. Under the covers in stand-alone mode, the "min" function is silently substituted for the grouping, but that's not true in SorlCloud mode. I broke this JIRA out separately to discuss whether it ever makes sense to group by a tokenized text field.

Grouping by the min value in a field is at least consistent, but on a text field I don't think it makes sense.

I propose that we explicitly dis-allow this in both stand-alone and Cloud mode, especially now that there's the SortableTextField.

Comments?

Issue Links

• is related to: SOLR-8088 Distributed grouping seems to require docValues in 5.x, didn't in 4.x