CriticalResolvedAWS post-event summaryUS East (N. Virginia)

Internal network congestion impairing us-east-1 control plane

Started

Dec 7, 2021, 3:30 PM UTC

Resolved

Dec 7, 2021, 10:22 PM UTC

Duration

6h 52m

Services impacted

Source: AWS post-event summaryLast verified 24 seconds agoVerify on the official source

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Impact

An automated scaling activity congested AWS’s internal network, degrading consoles, EC2 APIs, and dependent services for about seven hours.

US East (N. Virginia)us-east-1

ResolvedDec 7, 2021, 10:22 PM UTC
Network device congestion resolved; services operating normally with backlogs draining.
IdentifiedDec 7, 2021, 5:00 PM UTC
Internal-network congestion identified; scaling activity disabled and traffic being throttled.
InvestigatingDec 7, 2021, 3:45 PM UTC
Elevated error rates for the AWS Management Console and multiple APIs in us-east-1.

Network device congestion resolved; services operating normally with backlogs draining.