How can I resolve the error "native lambda error:InvalidSignatureException: Signature expired" when invoking a Lambda function using an AWS SDK?
"When I invoke my AWS Lambda function using an AWS SDK, the function returns a signature expired error."
"When I invoke my AWS Lambda function using an AWS SDK, the function returns a signature expired error.Short descriptionLambda expired signatures occurs when the client time and server time don't match similar to the following error:"Error: native lambda error:InvalidSignatureException: Signature expired: 20230118T161739Z is now earlier than 20230118T161739Z (20190318T162239Z - 5 min.)"An API request must reach AWS within five minutes of the timestamp in the request or AWS denies the request. In some scenarios, this issue can't be corrected by changing the client time to match the server time.ResolutionWhen invoking a Lambda function synchronously using an AWS SDK, the connection lasts until the response is returned. The Node.js SDK allows 50 connections by default. If the connection limit is reached, then the SDK queues the request locally until there is an available connection. The connection limit might be reached if you received the signature expired error, and the following actions are also true:The Lambda function isn't throttling.The client time is correct.(Node.js SDK only) The correctClockSkew:true option was set when creating the client to make sure that the time is corrected when invoking.The Lambda function's invoked at a high rate and runs for an extended period of time.The Lambda function's invoked at a high rate.The SDK signs the request and then puts it in a queue pending an available connection. If the queue becomes too large and the request is pending for more than five minutes, then the signature expires. Any additional requests fail because the signature is expired.To resolve this issue, consider using asynchronous invocation for Lambda if the response from the invocation isn't needed. This allows the SDK to use the connection only for invoking the request and won't wait for a response.You can also increase the maximum number of connections allowed by the SDK.Note: Additional connections allow the Lambda function to invoke at a higher rate, which might cause throttling.Related informationMonitoring and troubleshooting Lambda applicationsHow do I troubleshoot Lambda function invocation timeout errors?How do I determine if my Lambda function is timing out?Follow"