Open Stack

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The review on master branches are ready:

oslo.messaging with heartbeat off: 
https://review.openstack.org/#/c/174929/
requirement changes: https://review.openstack.org/#/c/174930/

Once they are merged, I will backport them to stable/kilo and sync the 
requirements to release oslo.messaging 1.8.2 with this new 
requirements.:

- ---
Mehdi Abaakouk
mail: sileht at sileht.net
irc: sileht


Le 2015-04-17 15:54, Sean Dague a écrit :
> It turns out a number of people are hitting -
> https://bugs.launchpad.net/oslo.messaging/+bug/1436769 (I tripped over
> it this morning as well).
> 
> Under a currently unknown set of conditions you can get into a 
> heartbeat
> loop with oslo.messaging 1.8.1 which basically shuts down the RPC bus 
> as
> every service is heartbeat looping 100% of the time.
> 
> I had py-amqp < 1.4.0, and 1.4.0 seems to have a bug fix for one of the
> issues here.
> 
> However, after chatting with silent in IRC this morning it sounded like
> the safer option might be to disable the rabbit heartbeat by default,
> because this sort of heartbeat storm can kill the entire OpenStack
> environment, and is not really clear how you recover from it.
> 
> All of which is recorded in the bug.
> 
> Proposed actions are to do both of:
> 
> - oslo.messaging release with heartbeats off by default (simulates 
> 1.8.0
> behavior before the heartbeat code landed)
> - oslo.messaging requiring py-amqp >= 1.4.0, so that if you enable the
> heartbeating, at least you are protected from the known bug
> 
> This would still let operators use the feature, we'd consider it
> experimental, until we're sure there aren't any other dragons hidden in
> there. I think the goal would be to make it default on again for 
> Marmoset.
> 
> 	-Sean
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