Sounds like an oslo bug, rather than nova, but needs an experts eye
** Tags added: zmq
** Also affects: oslo
Importance: Undecided
Status: New
** Changed in: nova
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1264925
Title:
Setting up the configuration rpc_zmq_topic_backlog causing zmq
receiver to silently ignore all messages
Status in OpenStack Compute (Nova):
Incomplete
Status in Oslo - a Library of Common OpenStack Code:
New
Bug description:
Setting up the configuration parameter rpc_zmq_topic_backlog causing
zmq receiver to silently ignore all messages - I had run strace on
nova-rpc-zmq-receiver, from where I see that, the issue was with one
configuration option “rpc_zmq_topic_backlog”, due to which the code
was silently returning without processing that message – there was no
logs or no trace in the zmq receiver log even after enabling debug.
What I see is that this option is set in zmq_opts array in
impl_zmq.py, but when a message come in, the class ZmqProxy check
this config item , and the function __getattr__ in the class
ConfigOpts (oslo/config/cfg.py) is raising error saying no such option
and then return it without processing that message further.
If I just comment out the configuration entry, it just works fine.
Please see attachment for Strace output.
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