Increased invoke timeouts

8:32 AM PDT We are investigating increased invoke timeout rates for AWS Lambda functions in the EU-WEST-1 Region.

9:15 AM PDT We are still investigating increased invoke timeout rates for AWS Lambda functions in the EU-WEST-1 Region. A subset of functions making API calls to other AWS services within the region are affected.

10:04 AM PDT We are still investigating increased invoke timeout rates and elevated latencies for a small proportion of AWS Lambda functions in the EU-WEST-1 Region. We have isolated the timeouts to network connectivity issues in a section of the AWS Lambda compute subsystem in the region, and are working through resolution and root cause. The issue affects a subset of functions making API calls to other AWS services within the region.

10:43 AM PDT We can confirm increased invoke timeouts and elevated latencies for a small proportion of AWS Lambda functions in the EU-WEST-1 Region. The issue affects a subset of functions making API calls to other AWS services within the region. There are no identified workarounds for affected Lambda functions at this time. We continue to investigate a network connectivity issue in a section of the AWS Lambda compute subsystem. We will formulate a mitigation plan based on these findings as we work towards narrowing root cause and work towards resolution.

11:49 AM PDT We continue to experience increased invoke timeouts and elevated latencies for a small proportion of AWS Lambda functions in the EU-WEST-1 Region. The issue affects a subset of functions making API calls to other AWS services within the region. At this point we have not identified any workarounds for affected Lambda functions, and we continue to investigate possible networking issues in a section of the AWS Lambda compute subsystem. We will make more information about our mitigation plan available as soon as we have more information to share.

2:03 PM PDT We continue to investigate our subsystems to identify the root cause of timeouts and elevated latencies for a small proportion of AWS Lambda functions in the EU-WEST-1 Region. Impairment is limited to a small proportion of non-VPC Lambda functions that make outbound network connections. We will update information about workarounds and mitigation plans once we have more information to share.

3:12 PM PDT Between October 4 9:46 AM and October 5 2:47 PM PDT, we experienced timeouts and elevated latencies for a small proportion of AWS Lambda functions in the EU-WEST-1 Region. Impairments were limited to a small proportion of non-VPC Lambda functions that made outbound network connections during this time. The issue has been resolved and the service is operating normally.