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https://issues.apache.org/jira/browse/SOLR-14374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17074621#comment-17074621
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David Smiley commented on SOLR-14374:
-------------------------------------
FYI it wasn't so simple because I feel a proper solution here should involve
some re-work around how various callers invoke
CoreContainer.createFromDescriptor which involves re-thinking some of the state
management methods on SolrCores. I think the result will be a welcome change
but it'll take me some time. I've paused work on that as I write this.
> Use coreLoadExecutor to load all cores; not just startup
> --------------------------------------------------------
>
> Key: SOLR-14374
> URL: https://issues.apache.org/jira/browse/SOLR-14374
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
>
> CoreContainer.load() creates coreLoadExecutor (an Executor) to load
> pre-existing cores concurrently -- defaulting to 8 at a time. Then it's
> never used again. However, cores might be loaded in other circumstances: (a)
> creating new cores, (b) "transient" cores, or (c) loadOnStartup=false cores,
> (d) reload cores. By using coreLoadExecutor for all cases, we'll then have
> metrics for core loading that work globally and not just on startup since
> coreLoadExecutor is instrumented already --
> {{CONTAINER.threadPool.coreLoadExecutor}} metrics path.
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