**Domino/Notes Version: 9.0.1 FP10
**Add-on Product (if appropriate, e.g. Verse / Traveler / Nomad / Domino REST API): Traveler
**Its Version: 10.0.1.2
**Operating System: Windows Server 2008
**Client (Notes, Nomad Web, Nomad Mobile, Android/iOS, browser version): 14.0 FP4
This afternoon we started have issues with apple iPhone’s synching with the traveler server and the following errors are appearing in the log. It appears to be a little intermittent where sometimes it works and then we start logging the error again and having synch issues.
We have the latest apns certificates on the server that don’t expire until March 2026. We did upgrade the APNS certificates from 2020 to the latest about 1 week ago and all has been working well until today?
No other network changes or server changes have been made so I am not sure why this has just started happening and what the issue is?
04/09/2025 03:33:11 PM Traveler: SEVERE *system Couldn’t connect to APNS server Exception Thrown: java.net.UnknownHostException: gateway.push.apple.com
04/09/2025 03:33:11 PM Traveler: SEVERE *system Couldn’t connect to APNS server Exception Thrown: java.net.UnknownHostException: gateway.push.apple.com
04/09/2025 03:33:12 PM Traveler: SEVERE *system Couldn’t connect to APNS server Exception Thrown: java.net.UnknownHostException: gateway.push.apple.com
04/09/2025 03:33:12 PM Traveler: SEVERE *system Couldn’t send message after 3 retries, Message(Id=229; Token=4165710572FF29111059C804DE6909BA23EDC80FB209EFD36A350095BFC57464; Payload={“aps”:{“content-available”:1},“TIMESTAMP”:“20250904153311212”}) Exception Thrown: com.notnoop.exceptions.NetworkIOException: java.net.UnknownHostException: gateway.push.apple.com