pipeline_jobs_generator_jdkNN hold a master executor while they wait for jobs to not be running.

[AdamBrousseau]

Similar to #176

The builds grab a master executor and then wait in 15 minute increments for the openjdkNN-pipleline to finish running. They should either remove this dependency completely or release the executor while it waits.

[zdtsw]

is this issue still valid? after executor is moved away from jenkins controller to "C3jenkins" node

[AdamBrousseau]

Changing which node the generator uses doesn't solve the problem. It simply moves it to another node. Unless the executor gets released while it waits, then the issue is still valid.