Maintenance on weekly.ci.jenkins.io and infra.ci.jenkins.io

weekly.ci.jenkins.io infra.ci.jenkins.io

[Initial Message] Friday February 27 2026, starting at 09:30 UTC, the Jenkins controllers and agents on weekly.ci.jenkins.io and infra.ci.jenkins.io will be upgraded to use JDK25 at runtime instead of JDK21.

This operation will require controller restarts and agent reconnections. A short service disruption is expected during the maintenance window.

See more details at https://github.com/jenkins-infra/helpdesk/issues/4941