Temporal incident

Some customers in AWS us-east-1 may be seeing a small number of gRPC UNIMPLEMENTED errors

Major Resolved View vendor source →

Temporal experienced a major incident on May 4, 2026 affecting us-east-1, lasting 1h 45m. The incident has been resolved; the full update timeline is below.

Started
May 04, 2026, 10:50 PM UTC
Resolved
May 05, 2026, 12:36 AM UTC
Duration
1h 45m
Detected by Pingoru
May 04, 2026, 10:50 PM UTC

Affected components

us-east-1

Update timeline

  1. investigating May 04, 2026, 10:50 PM UTC

    We are currently investigating a small number of gRPC UNIMPLEMENTED errors being returned in the AWS us-east-1 region.

  2. monitoring May 04, 2026, 11:23 PM UTC

    The issue has been identified as being related to a proxy node replacement rollout which has been halted. We are currently monitoring the region but do not anticipate any new errors at this point.

  3. resolved May 05, 2026, 12:36 AM UTC

    This incident has been resolved.