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AWS Lambda is a serverless compute service that allows you to run code without provisioning or managing servers. It automatically scales your applications by running code in response to triggers such as changes in data, shifts in system state, or user actions. AWS Lambda is designed to simplify the process of building and deploying applications, allowing developers to focus on writing code rather than managing infrastructure.
When working with AWS Lambda, you may encounter the error ProvisionedConcurrencyConfigNotFoundException
. This error indicates that the provisioned concurrency configuration you specified does not exist. This can be frustrating as it prevents your Lambda function from executing with the desired concurrency settings.
The ProvisionedConcurrencyConfigNotFoundException
error occurs when AWS Lambda cannot find the specified provisioned concurrency configuration. This typically happens if the configuration was never created, was deleted, or if there is a typo in the configuration name. Provisioned concurrency is a feature that ensures a set number of instances of your function are initialized and ready to respond to requests, which is crucial for applications requiring consistent start-up latency.
To resolve this issue, follow these steps:
Ensure that the function name and alias you are using in your request are correct. You can list all functions and aliases using the AWS CLI:
aws lambda list-functionsaws lambda list-aliases --function-name <your-function-name>
Use the AWS CLI to check if a provisioned concurrency configuration exists for your function and alias:
aws lambda get-provisioned-concurrency-config --function-name <your-function-name> --qualifier <alias-name>
If the configuration does not exist, you will need to create it.
If the configuration is missing, create a new one using the following command:
aws lambda put-provisioned-concurrency-config --function-name <your-function-name> --qualifier <alias-name> --provisioned-concurrent-executions <desired-count>
After creating the configuration, monitor your function to ensure it is working as expected. You can use AWS CloudWatch to track metrics and logs related to your Lambda function.
For more information on AWS Lambda and provisioned concurrency, refer to the following resources:
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