CODEWITHSUNDEEP
pythonaws-lambdaboto3
KangSheng Wong
KangSheng Wong

Reputation: 51

InvalidParameterValueException: The role defined for the function cannot be assumed by Lambda (Python Boto3)

I am using boto3 API on python and I have encounter this problem.

An error occurred (InvalidParameterValueException) when calling the CreateFunction operation: The role defined for the function cannot be assumed by Lambda.

Upvotes: 0

Views: 1162

Answers (1)

KangSheng Wong
KangSheng Wong

Reputation: 51

I found out that it need some time for AWS lambda to use the newly created roles.

My fix is like below:

  1. create a retry decorator for retrying the commands

     def retry(ExceptionToCheck=Exception, tries=4, delay=3, backoff=2):
     def deco_retry(func):

         @wraps(func)
         def wrapper(*args, **kwargs):
             cnt, mdelay = tries, delay
             while cnt > 1:
                 try:
                     return func(*args, **kwargs)
                 except ExceptionToCheck as e:
                     print(f'{str(e)}, Retrying in {mdelay} seconds...')
                     time.sleep(mdelay)
                     cnt -= 1
                     mdelay *= backoff
             return func(*args, **kwargs)

         return wrapper

     return deco_retry

  2. wraps the function from decorator

     @retry()
 def create(input):
     response = lambda_client.create_function(**input)
     return response

Upvotes: 1

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