I got two pages, both at around 10:30 pm my time, too late to be of any use to anyone.
I checked my gmail messages; there were a total of 14 emails to alerts@ for the Kafka broker on various hosts.
I checked the aql sms outgoing log and found 16 messages to my phone, 2 of which succeeded and 14 of which were rejected. I cannot get details on the rejection it seems.
I can give provide the exact timestamps of the rejected ones (or even little screenshots of the log entries) if that's useful; there are no unique identifying tags in the messages.