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https://issues.apache.org/jira/browse/SOLR-14928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anshum Gupta updated SOLR-14928:
--------------------------------
    Fix Version/s: 9.0

> Remove Overseer ClusterStateUpdater
> -----------------------------------
>
>                 Key: SOLR-14928
>                 URL: https://issues.apache.org/jira/browse/SOLR-14928
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud
>            Reporter: Ilan Ginzburg
>            Assignee: Ilan Ginzburg
>            Priority: Major
>              Labels: cluster, collection-api, overseer
>             Fix For: 9.0
>
>          Time Spent: 4h
>  Remaining Estimate: 0h
>
> Remove the Overseer {{ClusterStateUpdater}} thread and associated Zookeeper 
> queue at {{<_chroot_>/overseer/queue}}.
> Change cluster state updates so that each (Collection API) command execution 
> does the update directly in Zookeeper using optimistic locking (Compare and 
> Swap on the {{state.json}} Zookeeper files).
> Following this change cluster state updates would still be happening only 
> from the Overseer node (that's where Collection API commands are executing), 
> but the code will be ready for distribution once such commands can be 
> executed by any node (other work done in the context of parent task 
> SOLR-14927).
> See the [Cluster State 
> Updater|https://docs.google.com/document/d/1u4QHsIHuIxlglIW6hekYlXGNOP0HjLGVX5N6inkj6Ok/edit#heading=h.ymtfm3p518c]
>  section in the Removing Overseer doc.



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