Today I got an error
Provisioned Concurrency configuration failed to be applied. Reason: FUNCTION_ERROR_INIT_FAILURE
in CloudFormation while deploying stack with Lambda
And that’s all. No more details about the root cause.
My SAM file configures lambda with Provisioned Concurrency.
MyTestLambda:
Type: 'AWS::Serverless::Function'
Properties:
FunctionName: MyHandler
Handler: corpoprogrammer.MyHandler::handleRequest
ProvisionedConcurrencyConfig:
ProvisionedConcurrentExecutions: 1
After switching off Provisioned Concurrency my stack was successfully deployed but first lambda invocation finished with exception. Exception was thrown in lambda constructor because Java code was checking if required environmental variables were supplied in lambda configuration and throwing exception if not. So that’s why lambda initialization failed when Provisioned Concurrency was configured. Cloud formation Status reason
Provisioned Concurrency configuration failed to be applied. Reason: FUNCTION_ERROR_INIT_FAILURE
could be a bit more descriptive and root cause with stacktrace could be provided. Lambda with Provisioned Concurrency was successfully deployed after fixing environmental variables configuration.