When doing a minor update:
openstack overcloud update stack -i overcloud
with split-stack using pre-provisioned nodes, you are never prompted to clear any breakpoints. The client finishes running but the Heat stack is still stuck in progress until breakpoints are cleared.
This is due to the code in tripleo-common querying nova for server names and id's, but there are no nova servers when using pre-provisioned nodes. In that case, we will have to query Heat directly for the names and id's.