A simple publish or deliver operation invoked on the BrokerClusterPublisher object is executed on one of the valid Broker client connections from the Broker cluster publisher pool. If an error occurs during the execution, the operation will be either retried on a different Broker client on the Broker cluster publisher pool or returned as failed with proper exception. A failed operation on a Broker client from the Broker cluster publisher pool will not be retried on the same Broker client. BrokerClusterPublisher will retry on each of the Broker client connections from the cluster pool until the operation succeeds on one of the connections or returns an error when all of the Broker client connections are exhausted.