I do not know how to define this bug, because I am not sure what is happening still, nor am I certain why. I can just summarize that things that worked in 4.2 do not work in 4.3.
Distros: Centos 7. Ubuntu 14.
After executing the install workflow, I execute various custom workflows. Some of these register tasks on agents that were created in the install workflow.
I see these errors in the execution log:
To replicate the issue, follow the exact same instructions to replicate this issue. In step 9, instead of cancelling the execution, sit back and have some popcorn and wait for the haproxy agent to register the "establish" task. It's a long movie, so make sure to have plenty of buckets of popcorn.