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<p class="MsoNormal"><span lang="EN-CA">I’m looking at an issue (<a href="https://bugs.launchpad.net/starlingx/+bug/1835807">https://bugs.launchpad.net/starlingx/+bug/1835807</a>) where bindings in rabbit (e.g. neutron q-l3-plugin) intermittently stop working
during host failover (via reboot -f). Once this happens, any RPCs on the topic where the binding has died start timing out and being dropped, which renders the stx-openstack application nearly unusable once this happens. This can be recovered by deleting
the queues those topics are bound to, or by restarting rabbit.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">It looks like messages get into rabbit, which still has the bindings(seen by running rabbitmqctl -p neutron list_bindings), but rabbit ignores the bindings and treats the message as unroutable. When I set the alternative
exchange for that exchange (e.g. neutron) to the fanout for that topic, the RPCs start going through again.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">I am testing turning off ha mode in rabbit to see if that stops this from occurring, but would prefer a proper solution to prevent or fix this. Has anyone seen this before, and has a better solution for this? Does
anyone have any suggestions on debugging this, given that it clears up when rabbit restarts?<o:p></o:p></span></p>
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