Comment 1 for bug 1585525

I looked into it, and it appears there is one server which actually ends up with that error message. See http://logs.openstack.org/81/266881/10/check-tripleo/gate-tripleo-ci-f22-nonha/9eb113c/logs/undercloud/var/log/heat/heat-engine.txt.gz#_2016-05-20_08_30_40_620

ResourceGroup only surface the first error, so that's why you get that message at the top.

I don't know if we can aggregate errors, but I believe we're doing our best here.