Description of problem: Upon an update to RHELOSP4 a4, Heat will stop functioning and will timeout when executing any API command. How reproducible: A default value of qpid_topology_version=1 is set by heat and commented out in /etc/heat/heat.conf Steps to Reproduce: 1. Update to RHELOSP4 a4 2. Run 'heat stack-list' as admin 3. Wait for timeout to occur Actual results: heat-api.log: ERROR root [-] Unexpected error occurred serving API: Timeout while waiting on RPC response - topic: "engine", RPC method: "list_stacks" info: "<unknown>" Expected results: heat-api.log: DEBUG root [-] JSON response : {"stacks": []} to_json /usr/lib/python2.6/site-packages/heat/common/wsgi.py:578 Additional info: Default distribution file of /usr/share/heat/heat-dist.conf should be updated to include variable assignment of qpid_topology_version=2 like other components. This will prevent heat from breaking due to using the default version 1.
We should probably update the default in the code, not just in the config file. See also bug 1030658 (same issue in Nova & others).
Also fixed in: openstack-heat-2014.1.1-2.3.el6ost openstack-heat-2014.1.1-2.3.el7ost
tested in 2013.2.4-1.el6ost
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2014-1687.html