The error "cannot find module redis lambda" usually occurs when using AWS Lambda to connect to a Redis instance, and the appropriate Node.js package for Redis is either missing or not installed correctly in your Lambda function. It implies that your current Lambda environment doesn't recognize the 'redis' module or was unable to load it during runtime, leading to this error message.
To resolve this issue, you need to ensure that the necessary Redis package is included in your Lambda function's deployment package. First, make sure to install the 'redis' package by running
npm install redis in your project directory. Next, confirm that your
package.json file lists 'redis' as a dependency. Finally, create a deployment package containing your Lambda function code, the
node_modules folder (which includes the 'redis' package), and any other necessary files. Upload this package to your Lambda function on the AWS Console, and test the function again to verify if the error has been resolved. If you still encounter issues, double-check your code to ensure that the 'redis' module is being imported correctly.