Lambda unsupported runtime.

If you're encountering the "unsupported runtime" error when trying to create or update an AWS Lambda function, it means that the runtime you're attempting to use is not currently supported by Lambda. AWS Lambda supports specific runtimes, and if you try to deploy a function with an unsupported runtime, it will result in an error.

As of my last knowledge update in September 2021, AWS Lambda supports the following runtimes:

1. Node.js: 10.x, 12.x, 14.x, and 16.x
2. Python: 2.7, 3.6, 3.7, 3.8, 3.9, and 3.10
3. Java: 8 (Corretto), 11 (Corretto), and 15 (Corretto)
4. Ruby: 2.5 and 2.7
5. Go: 1. x
6. .NET Core: 2.1 and 3.1
7. Custom Runtime: You can also build your own custom runtime using the AWS Lambda Runtime Interface Emulator (RIE).

Here's what you should do if you encounter an "unsupported runtime" error:

1. Check for the Latest Runtimes:
   • AWS might have added support for new runtimes after my last update in September 2021. Visit the official AWS Lambda documentation to see if there are any new runtimes available.
2. Verify the Runtime Configuration:
   • Double-check that you've specified a supported runtime in your Lambda function configuration.
3. Select a Supported Runtime:
   • If you're using a runtime that's not on the supported list, you'll need to choose a supported one and modify your function accordingly.
4. Update Your Function:
   • If you're already using an unsupported runtime in an existing function, you'll need to update your function to use a supported runtime. This may involve rewriting and testing your function code.
5. Re-deploy the Function:
   • After making any necessary changes, re-deploy your Lambda function.
6. Monitor for Errors:
   • Keep an eye on the deployment process for any additional errors or warnings.

Remember to always consult the official AWS Lambda documentation for the most up-to-date information on supported runtimes and best practices.