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Unfortunately using the

--logtostderr

flag doesn't give anymore information regarding the error

I1229 17:49:45.266951    6261 provider_plugin.go:1353] provider received rpc error `Unknown`: `1 error occurred:
	* error creating Lambda Function: ValidationException: 
	status code: 400, request id: 79f07df0-87a2-4ef7-8e33-53e3ea360c0f

`
I1229 17:49:45.266972    6261 provider_plugin.go:1356] rpc error kind `Unknown` may not be recoverable
I1229 17:49:45.266988    6261 provider_plugin.go:717] Provider[aws, 0xc001b54840].Create(urn:pulumi:development::lambda-func-auth-send-welcome-email::aws:lambda/function:Function::auth-send-welcome-email) failed: 1 error occurred:
	* error creating Lambda Function: ValidationException: 
	status code: 400, request id: 79f07df0-87a2-4ef7-8e33-53e3ea360c0f

I1229 17:49:45.267020    6261 eventsink.go:86] eventSink::Error(<{%reset%}>1 error occurred:
	* error creating Lambda Function: ValidationException: 
	status code: 400, request id: 79f07df0-87a2-4ef7-8e33-53e3ea360c0f

<{%reset%}>)
I1229 17:49:45.267184    6261 snapshot.go:301] SnapshotManager: createSnapshotMutation.End(..., false)
I1229 17:49:45.267245    6261 snapshot.go:521] SnapshotManager.markOperationComplete(urn:pulumi:development::lambda-func-auth-send-welcome-email::aws:lambda/function:Function::auth-send-welcome-email)
I1229 17:49:45.724715    6261 step_executor.go:321] StepExecutor worker(5): step create on urn:pulumi:development::lambda-func-auth-send-welcome-email::aws:lambda/function:Function::auth-send-welcome-email failed with an error: 1 error occurred:
	* error creating Lambda Function: ValidationException: 
	status code: 400, request id: 79f07df0-87a2-4ef7-8e33-53e3ea360c0f

There are a couple of options you can use to get more information:

--debug

and

-v X

where X is from 1 to 9 and 9 providing the most information.

Hi Mitch, thanks for the reply. The output that I have shared was with the -v flag set to 9. Luckily I was able to figure out what was wrong by looking at examples on github and saw that by providing the

handler

property to the lambda function creation solved the problem.

Happy to hear you were able to figure it out.

@kind-school-28825 unfortunately this error is what is returned by the AWS API, it's not a Pulumi error