The env actually had a non-related issue with rabbitmq using CPU heavily on one of the controller nodes (2 other nodes worked just fine). This rabbitmq instance was unusable. Restart of rabbitmq-server helped.
The env actually had a non-related issue with rabbitmq using CPU heavily on one of the controller nodes (2 other nodes worked just fine). This rabbitmq instance was unusable. Restart of rabbitmq-server helped.