[jira] [Updated] (SOLR-10721) Provide a way to know when Core Discovery is finished and when all async cores are done loading

["Erick Erickson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-10721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Erick Erickson updated SOLR-10721:
----------------------------------
    Attachment: SOLR-10721.patch

Here's a first cut at a patch for feedback. At this point LOAD_COMPLETE and INITIAL_CORE_LOAD_COMPLETE are set at the same time, I think they're somewhat different concepts and deserve separate flags though one implies the other at this point.

> Provide a way to know when Core Discovery is finished and when all async cores are done loading
> -----------------------------------------------------------------------------------------------
>
>                 Key: SOLR-10721
>                 URL: https://issues.apache.org/jira/browse/SOLR-10721
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>            Priority: Minor
>         Attachments: SOLR-10721.patch
>
>
> Custom transient core implementations could benefit from knowing two things:
> 1> that core discovery is over
> 2> that all cores that are going to be loaded have been loaded, i.e. all loadOnStartup cores are done.
> It should be trivial to add a method to CoreContainer like "isLoaded" that would answer the first question since you can't get past the load() method without all the cores being discovered. I think this is a more generally useful bit of information than just core discovery is done.
> As for the second, that too seems trivial, just add a method to CoreContainer that returns the number of entries in SolrCores.currentlyLoadingCores.
> I'll add this in a few days unless there are objections.



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