jenkinsci/ec2-plugin — pull request #117 by timor-raiman (2014-11-20 11:03:35+00:00)
Title: Resolve [JENKINS-25693] pending spot instance launch blocks launch of non-spot instances.

In fact, a pending spot instance for one kind of slave would block future provisioning of any other kind of slave. Resolved by counting only those pending spot instances which would satisfy the requested label.