Thanks to Brad Chapman for catching and excerpting this; please discuss on his thread in -discuss. """ It looks like the "Post-Event Summary" for this outage has been published. I've excerpted the one-sentence root cause analysis (emphasis mine): https://aws.amazon.com/message/101925/ The root cause of this issue was a latent race condition in the DynamoDB DNS management system that resulted in an incorrect empty DNS record for the service’s regional endpoint (dynamodb.us-east-1.amazonaws.com) that the automation failed to repair. """ Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
Cisco Umbrella down in certain areas: https://status.umbrella.cisco.com/#/ -Hank
On Tue, Dec 30, 2025 at 03:10:57PM +0200, Hank Nussbacher via Outages <outages@outages.org> wrote a message of 20 lines which said:
Cisco Umbrella down in certain areas: https://status.umbrella.cisco.com/#/
"Monitoring - We identified issues and implemented a fix at 13:12 UTC. Subsequent internal checks indicate everything is working fine now. The team continues to monitor the situation closely."
participants (3)
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Hank Nussbacher -
Jay R. Ashworth -
Stephane Bortzmeyer