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Hi,

apparently nova can't reach rabbitmq, I would check rabbit logs and  
'rabbitmqctl cluster_status'.

Regards,
Eugen


Zitat von Tony Liu <tonyliu0592 at hotmail.com>:

> Hi,
>
> With Ussuri, failed to launch VM and saw such error from nova-compute.
> Didn't see any error in nova-api, nova-conductor and nova-scheduler.
> Did some search and not found any similar cases.
> Wondering anyone has ever hit this issue?
> =================================================
> 2020-12-09 13:24:29.333 8 ERROR oslo.messaging._drivers.impl_rabbit  
> [req-4226ac03-a5b7-446a-a74b-2785f9818927 - - - - -]  
> [3830bc00-1541-4951-b4ed-e73faafaa78c] AMQP server on  
> 10.6.20.21:5672 is unreachable: connection already closed. Trying  
> again in 1 seconds.: amqp.exceptions.RecoverableConnectionError:  
> connection already closed
> 2020-12-09 13:24:30.361 8 INFO oslo.messaging._drivers.impl_rabbit  
> [req-4226ac03-a5b7-446a-a74b-2785f9818927 - - - - -]  
> [3830bc00-1541-4951-b4ed-e73faafaa78c] Reconnected to AMQP server on  
> 10.6.20.21:5672 via [amqp] client with port 55524.
> 2020-12-09 13:26:28.377 8 ERROR oslo.messaging._drivers.impl_rabbit  
> [req-4226ac03-a5b7-446a-a74b-2785f9818927 - - - - -] Failed to  
> publish message to topic 'scheduler_fanout': :  
> amqp.exceptions.MessageNacked
> 2020-12-09 13:26:28.377 8 ERROR oslo.messaging._drivers.impl_rabbit  
> [req-4226ac03-a5b7-446a-a74b-2785f9818927 - - - - -] Unable to  
> connect to AMQP server on 10.6.20.21:5672 after inf tries: :  
> amqp.exceptions.MessageNacked
> 2020-12-09 13:26:28.378 8 ERROR oslo_service.periodic_task  
> [req-4226ac03-a5b7-446a-a74b-2785f9818927 - - - - -] Error during  
> ComputeManager._sync_scheduler_instance_info:  
> oslo_messaging.exceptions.MessageDeliveryFailure: Unable to connect  
> to AMQP server on 10.6.20.21:5672 after inf tries:
> =================================================
>
> Thanks!
> Tony