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https://issues.apache.org/jira/browse/SOLR-8561?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated SOLR-8561:
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Attachment: SOLR-8561.patch
Patch adds a CHANGES entry, currently under 5.4.1. I'd really like to get it
out in 5.4.1 (cause currently in order to upgrade to 5.4.0 you have to take
down your entire cluster), and [~jpountz] is about to cut the release soon. I'd
appreciate if I can get another set of eyes reviewing the change, although it's
a simple fallback strategy. [~varunthacker], [~noblepaul], [~ichattopadhyaya]
if you're around, would you mind giving this a quick review?
> Add fallback to ZkController.getLeaderProps for a mixed 5.4-pre-5.4
> deployments
> -------------------------------------------------------------------------------
>
> Key: SOLR-8561
> URL: https://issues.apache.org/jira/browse/SOLR-8561
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: SOLR-8561.patch, SOLR-8561.patch
>
>
> See last comments in SOLR-7844. The latter changed the structure of the
> leader path in ZK such that upgrading from pre-5.4 to 5.4 is impossible,
> unless all nodes are taken down. This issue adds a fallback logic to look for
> the leader properties on the old ZK node, as discussed.
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