rpc server cannot read messages from queue on Ubuntu 14.04

[James Li]

Solum is using oslo.messaging, and we recently found on Ubuntu 14.04 that our rpc server cannot read any messages from queue. But it runs fine on Precise.

The following is a simplified code of how we use oslo messaging, and you can use that to reproduce the problem:

https://github.com/jamesyli/test-messaging

On Precise the server can receive a message when you run client.

But on Trusty the server looks get blocked there and I cannot even CTRL-c it.

$ sudo rabbitmqctl list_queues
...
server-test 2
server-test.10.0.2.15 0
server-test_fanout_a356d6702f0343f7ad7eb275d01d075f 0
...

server log is at http://paste.openstack.org/show/85704/

client log is at http://paste.openstack.org/show/85703/

[Alexei Kornienko (alexei-kornienko)]

It seems that it doesn't work cause you use IP instead of hostname as server parameter.

[James Li (james-li-3)]

Hi Alexei, thanks for looking. I changed that parameter to 'localhost', but my server still cannot get messages on 14.04.

[Doug Hellmann (doug-hellmann)]

I believe we're running the devstack gate tests on trusty now, so AFAICT the code does work there. I'm not sure what the issue is with your example, but it will be easier to discuss that on the mailing list. If we determine there is actually a bug in oslo.messaging we can re-open this ticket.