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https://issues.apache.org/jira/browse/SOLR-17620?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Høydahl updated SOLR-17620:
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Attachment: Skjermbilde 2025-08-29 kl. 10.12.26.png
> Encode the version of Solr in SolrCloud "liveNode"
> --------------------------------------------------
>
> Key: SOLR-17620
> URL: https://issues.apache.org/jira/browse/SOLR-17620
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Labels: pull-request-available
> Fix For: 9.10
>
> Attachments: Skjermbilde 2025-08-29 kl. 10.12.26.png
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> This proposal is for the "live node" (ZkController.createEphemeralLiveNode)
> stored in ZK to have a JSON payload with the SolrVersion and other
> interesting metadata like the node roles. Furthermore, ZkStateReader should
> read this state and provide a method like getLowestSolrVersion().
> This foundational mechanism allows us to evolve SolrCloud safely using an
> in-place rolling upgrade strategy. Features that need to behave differently
> can consult the lowest SolrVersion to react accordingly.
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