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https://issues.apache.org/jira/browse/SOLR-9014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shalin Shekhar Mangar resolved SOLR-9014.
-----------------------------------------
    Resolution: Fixed
      Assignee: Shalin Shekhar Mangar

Let's create separate issues for the other improvements discussed here.

Thanks to all who have contributed!

> Deprecate and reduce usage of ClusterState methods which may make calls to ZK 
> via the lazy collection reference
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-9014
>                 URL: https://issues.apache.org/jira/browse/SOLR-9014
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 6.1, master
>
>         Attachments: SOLR-9014-deprecate-getCollections.patch, SOLR-9014.patch
>
>
> ClusterState has a bunch of methods such as getSlice and getReplica which 
> internally call getCollectionOrNull that ends up making a call to ZK via the 
> lazy collection reference. Many classes use these methods even though a 
> DocCollection object is available. In such cases, multiple redundant calls to 
> ZooKeeper can happen if the collection is not watched locally. This is 
> especially true for Overseer classes which operate on all collections.
> We should audit all usages of these methods and replace them with calls to 
> appropriate DocCollection methods.



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