Outage in Temporal
Some customers in AWS us-east-1 experienced a small number of gRPC UNIMPLEMENTED errors
Resolved MinorIncident Report
Summary AI Generated
Some customers using Temporal in AWS us-east-1 experienced gRPC UNIMPLEMENTED errors for 25 minutes on May 28th from 19:40 to 20:05 UTC. The service was quickly stabilized after the root cause was identified, and the team implemented a permanent fix to prevent recurrence.
Some customers in AWS us-east-1 experienced a small number of gRPC UNIMPLEMENTED errors today from 19:40 to 20:05 UTC.
We have identified a root cause and are currently working towards a permanent fix.
Components affected
Temporal us-east-1Trusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 16 hours ago - at 05/29/2026 10:14PM
The service has remained stable since the initial behavior was observed 5/28 19:40 to 20:05 UTC.
A permanent fix for the region is now in-progress.
MONITORING
1 day ago - at 05/29/2026 10:48AM
The service continues to operate normally. We will provide additional updates as they become available.
MONITORING
1 day ago - at 05/29/2026 02:11AM
The service remains stable. We are continuing to monitor closely while work progresses on a permanent fix to prevent recurrence.
MONITORING
1 day ago - at 05/28/2026 11:17PM
We have confirmed the service is now stable and are now working to ensure a permanent fix is in place to prevent any recurrence.
We will continue to monitor for errors until the fix is deployed.
MONITORING
1 day ago - at 05/28/2026 10:14PM
Service has remained stable and we are continuing to monitor the situation.
We will continue to provide updates as they become available.
MONITORING
1 day ago - at 05/28/2026 09:00PM
The gRPC UNIMPLEMENTED errors previously observed have been mitigated.
We are continuing to monitor the situation and are working towards a permanent fix at this time.
IDENTIFIED
1 day ago - at 05/28/2026 08:22PM
Some customers in AWS us-east-1 experienced a small number of gRPC UNIMPLEMENTED errors today from 19:40 to 20:05 UTC.
We have identified a root cause and are currently working towards a permanent fix.
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