us-east-1 is reenabled and the service is operating normally. The root cause has been confirmed to be a defective Network Load Balancer that was causing a small fraction of connection attempts in the region to fail. We are awaiting a postmortem from AWS on the issue, and will publish our own postmortem here once we have that.
Posted Oct 26, 2026 - 11:45 UTC
Update
us-east-1 remains disabled. All traffic is being routed to other regions so there is no ongoing impact on service.
Posted Oct 25, 2026 - 22:55 UTC
Monitoring
Traffic is no longer being routed to us-east-1, but instead to us-east-2 and us-west-1. We are continuing to investigate the root cause of the networking issue in us-east-1.
Posted Oct 25, 2026 - 21:33 UTC
Investigating
We are seeing an elevated rate of connection errors in the us-east-1 region, seemingly as a result of a partial loadbalancer failure. We are disabling the region so traffic will be routed to other US sites.
Posted Oct 25, 2026 - 21:24 UTC
This incident affected: Ably Pub/Sub (US East (Northern Virginia)).