Category: Message Queue Performance

The Erlang VM has reported a `busy_dist_port` condition, meaning the send buffer of a distribution port (used for inter-node traffic inside aRabbitMQ cluster) is full. When this happens the scheduler suspends the process owning the port, stalling inter-node replication, managementcalls, and any RabbitMQ process that must use that port. Throughput drops and latency rises until the buffer drains or the node is restarted.