Parameterized Project: Label Parameter

[jkao97]

Problem:
I have a parameterized project that takes in a 'Label' as a parameter. When I try to run the job, it gets stuck in the build queue even though a node container is already created for it. Has anyone bumped into this issue before?

[gutschet]

I have the same problem sometimes. Up to now, the problem always disappeared when I restarted mit Jenkins Master Node (a Docker Swarm service in my case).