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https://issues.apache.org/jira/browse/SOLR-8696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15172616#comment-15172616
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ASF subversion and git services commented on SOLR-8696:
-------------------------------------------------------

Commit a9aec24236df61a3f1cfe533b64169fae84fc6f7 in lucene-solr's branch 
refs/heads/master from [~markrmil...@gmail.com]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=a9aec24 ]

SOLR-8696: Straighten out calls to 
ZkStateReader#createClusterStateWatchersAndUpdate.


> Start the Overseer before actions that need the overseer on init and when 
> reconnecting after zk expiration and improve init logic.
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-8696
>                 URL: https://issues.apache.org/jira/browse/SOLR-8696
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>    Affects Versions: 5.4.1
>            Reporter: Scott Blum
>            Assignee: Mark Miller
>              Labels: patch, performance, solrcloud, startup
>             Fix For: master
>
>         Attachments: SOLR-8696-followup.patch, SOLR-8696.patch, 
> SOLR-8696.patch
>
>
> ZkController.publishAndWaitForDownStates() occurs before overseer election.  
> That means if there is currently no overseer, there is ironically no one to 
> actually service the down state changes it's waiting on.  This particularly 
> affects a single-node cluster such as you might run locally for development.
> Additionally, we're doing an unnecessary ZkStateReader forced refresh on all 
> Overseer operations.  This isn't necessary because ZkStateReader keeps itself 
> up to date.



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