kubernetes:4353.vb_47977da_9417 requires kubernetes-client-api >=
7.3.1-256.v788a_0b_787114 (confirmed via plugins.jenkins.io), but that
plugin was never explicitly pinned in installPlugins — left to
resolve on its own at image-build time, it landed on an older,
incompatible version. Every build agent launch then crashed with
NoSuchMethodError: ConfigBuilder.withMasterUrl(String) inside
Reaper.preLaunch -> KubernetesCloud.connect ->
KubernetesFactoryAdapter.createClient: pods provisioned fine at the
Kubernetes API level, but the controller could never actually connect
an agent to them, so every demo-go-app build hung forever at "Still
waiting to schedule task".
Mukul Sharma
8b37db4636