[SOLR-15124] Remove node/container level admin handlers from ImplicitPlugins.json (core level).

• Type: Task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 9.0
• Labels: newdev
• Assignee: David Smiley
• Reporter: David Smiley
• Created: 31/Jan/21 16:56
• Updated: 12/May/22 00:26
• Resolved: 07/Feb/22 00:50

Description

There are many very old administrative RequestHandlers registered in a SolrCore that are actually JVM / node / CoreContainer level in nature. These pre-dated CoreContainer level handlers. We should (1) remove them from ImplictPlugins.json, and (2) make simplifying tweaks to them to remove that they work at the core level. For example LoggingHandler has two constructors and a non-final Watcher because it works in these two modalities. It need only have the one that takes a CoreContainer, and Watcher will then be final.

/admin/threads
/admin/properties
/admin/logging

Should stay because has core-level stuff:
/admin/plugins
/admin/mbeans

This one:
/admin/system – SystemInfoHandler
returns "core" level information, and also node level stuff. I propose splitting this one to a CoreInfoHandler to split the logic. Maybe a separate issue.

Issue Links

• relates to: SOLR-4943 Add a new info admin handler.
• links to: GitHub Pull Request #198
• links to: GitHub Pull Request #589
• links to: GitHub Pull Request #2278