RE: Intermittent DNS resolution failure on nRF9151 after repeated short-interval events (Telstra eSIM, Australia)

Priyesh Shahi — Mon, 02 Feb 2026 11:23:07 GMT

Hi Kenta,

Thank you for sharing the details and the MQTT main.c reference. I appreciate you sending that over.

I am currently testing with a similar loop around getaddrinfo as a workaround and will observe if there are any changes or improvements in the results.

Thanks again for the insight and for pointing out the possible DNS timing issue.

Best regards,
Priyesh

RE: Intermittent DNS resolution failure on nRF9151 after repeated short-interval events (Telstra eSIM, Australia)

Kenta — Sun, 01 Feb 2026 15:47:04 GMT

Hi, Priyesh.

When I was previously experimenting with the nRF9160 and nRF7002, it seemed that the first name resolution using getaddrinfo was failing. To work around this, I tried calling getaddrinfo multiple times.

This may not be a very elegant solution, but I’ve attached the MQTT main.c for the nRF7002 that I used at the time, so please feel free to use it as a reference.

A friend suggested that the failure might be because a DNS query is being sent before the device is fully connected to the DNS server. In any case, I handled it as a workaround, as shown in the attached main.c.

Best regards.
- Kenta

devzone.nordicsemi.com/.../50371.main.c