Elevated WAF Error Rates

9:07 AM PST We are investigating increased error rates for request inspection by AWS WAF in the EU-WEST-1 Region. Customers who use AWS WAF with ALB in EU-WEST-1 may see increased ALB error rates.

9:15 AM PST We are investigating increased error rates for request inspection by AWS WAF in the EU-WEST-1 Region. Customers who use AWS WAF with ALB in EU-WEST-1 may see increased ALB error rates. Impacted customers can optionally set ALB to fail open instead of the default of failing closed: https://docs.aws.amazon.com/elasticloadbalancing/latest/application/application-load-balancers.html#load-balancer-waf

10:22 AM PST We are starting to see recovery of error rates for request inspection by AWS WAF in the EU-WEST-1 Region. Impacted customers can optionally set ALB to fail open instead of the default of failing closed: https://docs.aws.amazon.com/elasticloadbalancing/latest/application/application-load-balancers.html#load-balancer-waf

10:45 AM PST Between 7:54 AM and 9:43 AM PST, some customers may have experienced elevated error rates for request inspection by AWS WAF in the EU-WEST-1 Region. The issue has been resolved and the service is operating normally.