[SOLR-17024] Remove support for deprecated "collection-default clusterprop syntax

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 9.5
• Fix Version/s: main (10.0), 9.5
• Assignee: Jason Gerlowski
• Reporter: Jason Gerlowski
• Created: 11/Oct/23 12:40
• Updated: 12/Feb/24 19:48
• Resolved: 23/Oct/23 12:57

Description

SOLR-12827 changed the structure that Solr uses to store collection-default clusterprops all the way back in 8.0.

Prior to 8.0, collection-default clusterprops were specified using a collectionDefaults key, as in:

{
  "collectionDefaults" : {
      "numShards": 2,
      "numNrtReplicas": 2,
  }
}

Starting with 8.0, this was changed to a format that relies on additional nesting:

{
  "defaults" : {
    "collection": {
      "numShards": 2,
      "numNrtReplicas": 2,
    }
  }
}

SOLR-12827 deprecated the old format and removed all documentation referencing it. The code itself though still has a few vestiges of this old format. This ticket aims to remove these last traces of the old format.

Issue Links

• links to: GitHub Pull Request #2002