Searchlight does not receive notification when deployed in same env as Ceilometer

See: http://specs.openstack.org/openstack/oslo-specs/specs/kilo/notification-listener-pools.html

After discussion with ceilometer team, the decision was to use another topic for notifications specific to searchlight.

Here's the IRC meeting transcirpt:
<gordc> #topic Open discussion
* openstack has changed the topic to: Open discussion (Meeting topic: ceilometer)
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<gordc> does anyone have oslo.messaging 1.16.x + devstack installed?
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<gordc> just for reference, https://bugs.launchpad.net/ceilometer/+bug/1475307
<openstack> Launchpad bug 1475307 in Ceilometer "collector has possible memory leak" [Critical,New]
<lakshmiS> Have a question for ceilometer team. I am core commiter on Openstack searchlight project and we consume notifications from glance but when ceilometer is running, searchlight listener doesn't recieve those notifications.
<lakshmiS> We have to stop ceilometer for searchlight to receive new notifications. Searchlight project has a patchset to include a pool name: https://review.openstack.org/#/c/202392/
<lakshmiS> Can ceilometer do similarly or any other suggestions?
<eglynn> lakshmiS: you need to configure glance to emit on two topics IIRC
<gordc> lakshmiS: ^
<cdent> eglynn: that seems unfair
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<eglynn> cdent: life is unfair :)
<lakshmiS> can we not use different pool names: atleast that's what the oslo messaging document says
<cdent> you're basically putting a dependency on a source for their to be multiple listeners
<cdent> s/their/there/
<cdent> whereas what we'd like in a distributed system is for there to be N potential listeners without needing to change the source
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<gordc> lakshmiS: there was an issue with that oslo.messaging
* cdent looks at sileht
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<lakshmiS> cdent: +1
<sileht> that should just work
<eglynn> cdent: yeap, it's certainly not pretty, I just think that's the current reality
* cdent does not aspire to reality ;)
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<eglynn> sileht: a-ha, k ... good to know
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<lakshmiS> I tried changing ceilometer listener code to have a pool name but it stops working afer a while
<lakshmiS> is there anyone from ceilometer team I can discuss this offline?
<gordc> sileht: wasn't there an issue with pools, something about it not being created at right time so we'd lose messages?
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<sileht> kmartin,you need to take a look to your rabbitmq queues and find those prefixed with searchlight-listener
<gordc> lakshmiS: we're all over at #openstack-ceilometer (more euro based) but there's a few of us (me) in americas tz
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Reviewed: https://review.openstack.org/202392
Committed: https://git.openstack.org/cgit/openstack/searchlight/commit/?id=080c8993d0fcfd7d473bd3ee5f611938eb61e518
Submitter: Jenkins
Branch: master

commit 080c8993d0fcfd7d473bd3ee5f611938eb61e518
Author: Lakshmi N Sampath <email address hidden>
Date: Wed Jul 15 22:44:53 2015 -0700

    Fix issue with multiple notification listeners

    Adds searchlight specific topic for glance which
    resolves the conflict with ceilometer and other
    services which also consume glance notifications

    Closes-Bug: #1470627
    Change-Id: Iae28a1527fa93bca4de59fd272eb29b5cbb30fee