If Kafka is not available to send messages no external activity can occur.
For these systems, a Kafka outage may result in the inability to accept new transactions.
In this case, it may be appropriate to return an error message and allow the external third party to try again later.
Therefore, we will have to wait for the cluster to get back up so that the message broker can send the failed messages again.
M4: Likewise, we will have to wait for the cluster to get back up so that the message broker can send the failed messages again.