Issue
When I try to access the update-center.json file, on https://jenkins-updates.cloudbees.com/update-center/operations-center/update-center.json, I’m always getting a 404 error status.
Environment
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CloudBees CI (CloudBees Core) on modern cloud platforms - Managed controller
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CloudBees CI (CloudBees Core) on modern cloud platforms - Operations Center
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CloudBees CI (CloudBees Core) on traditional platforms - Client controller
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CloudBees CI (CloudBees Core) on traditional platforms - Operations Center
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CloudBees Jenkins Enterprise - Managed controller
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CloudBees Jenkins Enterprise - Operations center
Resolution
In order to be able to provide a Update Center file for each core version, a query parameter is mandatory on this URL: version.
So, if you are using an Operation Center with version 2.204.1.3 you need to use the url https://jenkins-updates.cloudbees.com/update-center/operations-center/update-center.json?version=2.204.1.3.