Have you checked that your notification queues aren't filling up? It can
cause performance problems in Rabbit if nothing is clearing out those
queues.

On 9/12/19 4:35 AM, Md. Farhad Hasan Khan wrote:
> Hi,
>
> I’m getting this error continuously in rabbitmq log. Though all
> operation going normal, but slow. Sometimes taking long time to perform
> operation. Please help me to solve this.
>
> rabbitmq version: rabbitmq_server-3.6.16
>
> =ERROR REPORT==== 12-Sep-2019::13:04:55 ===
>
> Channel error on connection <0.8105.3> (192.168.21.56:60116 ->
> 192.168.21.11:5672, vhost: '/', user: 'openstack'), channel 1:
>
> operation queue.declare caused a channel exception not_found: failed to
> perform operation on queue 'versioned_notifications.info' in vhost '/'
> due to timeout
>
> =WARNING REPORT==== 12-Sep-2019::13:04:55 ===
>
> closing AMQP connection <0.8105.3> (192.168.21.56:60116 ->
> 192.168.21.11:5672 -
> nova-compute:3493037:e6757c9b-1cdc-43cd-bfd3-dcb58aa4974a, vhost: '/',
> user: 'openstack'):
>
> client unexpectedly closed TCP connection
>
> Thanks & B’Rgds,
>
> Rony
>