Jenkins, MiniKube & Kubernetes Plugin - Dynamically spawning slaves
Im using a kubernetes plugin 0.12 and have a problem ClosedChannelException (I think this is not problem on connection to master but a communicate doesn't acceptable then connection timeout and closed) on Jenkins slave too and I solved this problem when I upgrade Jenkins version from 2.60-alpine to 2.75-apline. Jenkins slave working perfectly now. Hopefully this will help you to solve a problem.
PS. Kubernetes plugin has release new version on 1.0 and I also upgraded to new version it working perfectly too!