CODEWITHSUNDEEP
aws-lambdaaws-roles
user2498899
user2498899

Reputation: 181

AWS lambda:InvokeFunction AccessDeniedException

I am trying to call a python lambda function from within another lambda function using:

client = boto3.client('lambda')
response = 
client.invoke(FunctionName=arn,InvocationType='RequestResponse',
Payload=json.dumps(data))

But I run into the following AccessDenied error: "errorMessage": "An error occurred (AccessDeniedException) when calling the Invoke operation: User: arn:aws:sts::nnnn:assumed-role/lambda-s3-full-access/cache-simdata-srv is not authorized to perform: lambda:InvokeFunction on resource: arn:aws:lambda:us- west-1:nnnn:function:cache-s-s

I had a similar problem before but was never able to figure out what polices to add to the lambda execution role. Currently both lambdas has the following execution role:

AmazonDynamoDBFullAccess
AmazonS3FullAccess
AWSLambdaBasicExecutionRole

I am grateful for any advice.

Upvotes: 1

Views: 159

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