It's unfortunate a user can't customize the default. I could imagine theoretically a number of ways we might make that work. Maybe one would be for the solrconfig.xml to indicate somehow that it should not inherit any other plugins (at all). Register everything that you use.
On Sat, Dec 13, 2025 at 8:24 AM David Eric Pugh via dev <[email protected]> wrote: > I then started looking at the writer types, as I've used configapi to > modify the json one in the past. RequestHandlers are set up via > ImplicitPlugins.json, but writer types aren't: > Query Response Writers vs Request Handlers > > Here's how query response writers are handled differently from request > handlers: > > Request Handlers > > - Defined in: ImplicitPlugins.json (as you can see with /update/csv) > - Format: JSON configuration file with explicit handler definitions > - Registration: Loaded from ImplicitPlugins.json and merged > with solrconfig.xml definitions > > Query Response Writers > > - NOT in ImplicitPlugins.json - They're handled completely differently > - Defined in: SolrCore.java as > hard-coded DEFAULT_RESPONSE_WRITERS (static initialization block, lines > 3093-3109) > - Registration: > - Hard-coded defaults are created in a static block in SolrCore.java > - Additional writers can be defined > in solrconfig.xml using <queryResponseWriter> tags > - The PluginBag.init() method merges solrconfig.xml definitions with > the defaults > > > Does this matter? Seems odd to have two ways to do the same basic thing. > If I wanted to remove CSV as a update type and a witertype, thoughts on > how to do it? Without just going in and doing a custom build of Solr? > Does adding/removing writer types and request handlers come up for anyone > else? This is for someone who is looking for a very locked down version of > Solr, but doens't want a custom build. > Eric > > On Friday, December 12, 2025 at 05:45:30 PM EST, Houston Putman < > [email protected]> wrote: > > Yeah, I think the config api really only touches the configoverlay.json. > So > it makes sense to me that it could only delete things that it originally > made. > > - Houston > > On Fri, Dec 12, 2025 at 11:57 AM David Eric Pugh via dev < > [email protected]> wrote: > > > I was playing around with the Config API, and I wanted to remove the > > /update/csv request handler. I expected just to run: > > > > > > curl -X POST -H 'Content-type:application/json' -d '{ > > > > "delete-requesthandler": "/update/csv" > > > > }' http://localhost:8983/solr/techproducts/config > > > > > > However I get back an error. Reading the ref guide > > > https://solr.apache.org/guide/solr/latest/configuration-guide/config-api.html#commands-to-modify-the-config > it > > seems to suggest that while I can delete a request handler I create using > > the Config API, I can't delete one that comes with Solr? > > > > Does this resonate with other folks? Why can't I use Config API to > remove > > any request handler? Is it because we only delete things that exist in > > the configoverlay.json file? > > Eric > > >
