The Qpid driver's v2 topology has been introduced to specifically address the slow growth of orphaned direct exchanges over time. By default, however, services still used the original v1 topology of the Qpid driver. The v2 topology had to be explicitly configured via the 'qpid_topology_version = 2' parameter.
With this fix, the Orchestration service's distribution configuration file (/usr/share/heat/heat-dist.conf) now contains the 'qpid_topology_version = 2' parameter. This effectively sets the Qpid driver's v2 topology as the default.
In addition, the default value in the Qpid implementation has been changed to 2 as well.
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.
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
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.