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https://issues.apache.org/jira/browse/SOLR-12182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17088558#comment-17088558
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Gézapeti commented on SOLR-12182:
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I'm sorry [~martinentwistle], it looks like I've uploaded a corrupt patch file.
It had some logic about leaving out the schema and the ports when doing the
comparison in CloudUtil, but it didn't fix the issue.
I'll try to dig up the patch, but I'm on a new machine since and I'm not sure
it's there. Feel free to pick up the issue if you have the cycles to work on
it. Unfortunately I don't, but I'm happy to help if you're stuck.
> Can not switch urlScheme in 7x if there are any cores in the cluster
> --------------------------------------------------------------------
>
> Key: SOLR-12182
> URL: https://issues.apache.org/jira/browse/SOLR-12182
> Project: Solr
> Issue Type: Bug
> Affects Versions: 7.0, 7.1, 7.2
> Reporter: Anshum Gupta
> Priority: Major
> Attachments: SOLR-12182.patch
>
>
> I was trying to enable TLS on a cluster that was already in use i.e. had
> existing collections and ended up with down cores, that wouldn't come up and
> the following core init errors in the logs:
> *org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:
> replica with coreNodeName core_node4 exists but with a different name or
> base_url.*
> What is happening here is that the core/replica is defined in the
> clusterstate with the urlScheme as part of it's base URL e.g.
> *"base_url":"http:hostname:port/solr"*.
> Switching the urlScheme in Solr breaks this convention as the host now uses
> HTTPS instead.
> Actually, I ran into this with an older version because I was running with
> *legacyCloud=false* and then realized that we switched that to the default
> behavior only in 7x i.e while most users did not hit this issue with older
> versions, unless they overrode the legacyCloud value explicitly, users
> running 7x are bound to run into this more often.
> Switching the value of legacyCloud to true, bouncing the cluster so that the
> clusterstate gets flushed, and then setting it back to false is a workaround
> but a bit risky one if you don't know if you have any old cores lying around.
> Ideally, I think we shouldn't prepend the urlScheme to the base_url value and
> use the urlScheme on the fly to construct it.
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