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https://issues.apache.org/jira/browse/SOLR-8416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061272#comment-15061272
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Michael Sun commented on SOLR-8416:
-----------------------------------

bq.  the collection is "usable" from the client – each shard has a leader that 
is live and active?

>From client perspective, the collection or cluster is usable if the leader is 
>active. However if high load of indexing starts before all replica becomes 
>active, I am not sure if there will be too much sync traffic once replica 
>starts. 

> Solr collection creation API should return after all cores are alive 
> ---------------------------------------------------------------------
>
>                 Key: SOLR-8416
>                 URL: https://issues.apache.org/jira/browse/SOLR-8416
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>            Reporter: Michael Sun
>         Attachments: SOLR-8416.patch
>
>
> Currently the collection creation API returns once all cores are created. In 
> large cluster the cores may not be alive for some period of time after cores 
> are created. For any thing requested during that period, Solr appears 
> unstable and can return failure. Therefore it's better  the collection 
> creation API waits for all cores to become alive and returns after that.



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