[SOLR-14265] Move collections admin API to v2 completely

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Anshum Gupta
• Reporter: Anshum Gupta
• Created: 18/Feb/20 08:28
• Updated: 11/Jan/21 17:21

Description

V2 admin API has been available in Solr for a very long time, making it difficult for both users and developers to remember and understand which format to use when. We should move to v2 API completely for all Solr Admin calls for the following reasons:

1. converge code - there are multiple ways of doing the same thing, there's unwanted back-compat code, and we should get rid of that
2. POJO all the way - no more NamedList. I know this would have split opinions, but I strongly think we should move in this direction. I created Jira about this specific task in the past and went half way but I think we should just close this one out now.
3. Automatic documentation
4. Others

This is just an umbrella Jira for the task. Let's create sub-tasks and split this up as it would require a bunch of rewriting of the code and it makes a lot of sense to get this out with 9.0 so we don't have to support v1 forever! 

There have been some conversations going on about this and it feels like most folks are happy to go this route.