[SOLR-15782] Configure custom node/container handlers in solr.xml

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: David Smiley
• Created: 09/Nov/21 16:58
• Updated: 04/Dec/24 23:59

Description

Since Solr 8.6 via SOLR-14404, it's been possible to define custom node/CoreContainer request handlers.  However, the current mechanism requires the use of cluster properties (in ZooKeeper).  That allows for dynamic registration (cool) but it's awkward to pre-define them – it doesn't comply with an immutable infrastructure philosphy where node handlers can be defined by configuration local to the Solr node.  That's solr.xml.  So here, I propose that node handlers be defined there, perhaps the same as is done in solrconfig.xml.

Issue Links

• duplicates: SOLR-13543 Custom requesthandlers at CoreContainer level
• incorporates: SOLR-17079 Allow to declare replica placement plugins in solr.xml
• relates to: SOLR-14404 CoreContainer level custom requesthandlers
• relates to: SOLR-17096 Support for Cluster Singleton plugins in solr.xml
• links to: GitHub Pull Request #2016