[jira] [Resolved] (SOLR-9264) Optimize ZkController.publishAndWaitForDownStates

["Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-9264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shalin Shekhar Mangar resolved SOLR-9264.
-----------------------------------------
    Resolution: Fixed

Thanks for the review Hrishikesh!

> Optimize ZkController.publishAndWaitForDownStates
> -------------------------------------------------
>
>                 Key: SOLR-9264
>                 URL: https://issues.apache.org/jira/browse/SOLR-9264
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 6.2, master (7.0)
>
>         Attachments: SOLR-9264.patch, SOLR-9264.patch, SOLR-9264.patch
>
>
> ZkController.publishAndWaitForDownStates keeps looping over all collections in the cluster state to ensure that every replica hosted on the current node has been marked as down. This is wasteful when you have a large number of collections because each access to a non-watched collection gets data from ZK. Instead, we can watch the interesting collections (i.e. which have replicas hosted locally) and wait till we see the required state.



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