[jira] [Commented] (SOLR-16542) Remove OverseerConfigSetMessageHandler; always do distributed mode

["David Smiley (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-16542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17631400#comment-17631400 ] 

David Smiley commented on SOLR-16542:
-------------------------------------

It'd be nice to switch this as a setting for 9.x.  I'd prefer to see two booleans instead of one combination.  As this is remarkably under-documented as I write this (not in Solr Ref Guide, only a reference to the option conceptually), we could probably simply do it.

The only published reference to this I see is `major-changes-in-solr-9.adoc` with this bullet:
* Support for distributed processing of cluster state updates and collection API calls, without relying on the Overseer.

> Remove OverseerConfigSetMessageHandler; always do distributed mode
> ------------------------------------------------------------------
>
>                 Key: SOLR-16542
>                 URL: https://issues.apache.org/jira/browse/SOLR-16542
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud
>            Reporter: David Smiley
>            Priority: Major
>              Labels: newdev
>             Fix For: main (10.0)
>
>
> {{distributedCollectionConfigSetExecution}} is a boolean setting on solr.xml/solrCloud that switches *both* Collection API *and* ConfigSet API processing between Overseer based (when =false) vs distributed (when =true).  In this issue, remove the Overseer based processing of ConfigSets, thus always use DistributedCollectionConfigSetCommandRunner instead for ConfigSet processing, regardless of the {{distributedCollectionConfigSetExecution}} boolean setting.  Namely, OverseerConfigSetMessageHandler would be removed.  The boolean toggle would henceforth only toggle the "collection" aspect of wether to do distributed processing vs Overseer (centralized).



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