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https://issues.apache.org/jira/browse/SOLR-16542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17697685#comment-17697685
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David Smiley commented on SOLR-16542:
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I looked closer. So there's one DistributedCollectionConfigSetCommandRunner
that, as its name suggests, does *both* Collection and ConfigSet stuff. The
field in CoreContainer holding this will no longer be Optional because we need
it for _at least_ ConfigSet processing. But we can keep the method
CoreContainer.getDistributedCollectionCommandRunner which returns an Optional.
It can return empty or the field based on wether that's enabled for collection
processing by looking at NodeConfig.getDistributedCollectionConfigSetExecution
(which ought to be renamed to remove the ConfigSet part). A *new* method right
next to it named getDistributedConfigSetCommandRunner can be added which does
not return the field wrapped in an Optional. Sound good?
> 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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