Using invoke to call another lambda function always timeout.

Hello,

Apologies if this is not the right place to file this issues. But please let me try to explain my situation.

I have an API Gateway that can successfully call a lambda function. This lambda function base on a certain condition should invoke another lambda function. The code is very simple:

import boto3, json, logging
logger = logging.getLogger()
logger.setLevel(logging.INFO)

client = boto3.client('lambda')

def lambda_handler(event, context):
    raw_event = event.get('body')
    if raw_event.get('event') == "voicecall_final":
        # trigger the next lambda function
        res = client.invoke(
            FunctionName='aggregate',
            InvocationType='RequestResponse',
            Payload=json.dumps({'engagement_id': raw_event.get('engagement_id')})
        )

However I can’t seem to reach other function, the other function is just printing the payload for now. I cannot even get the res variable. Here are the logs:

START RequestId: 21583ec8-a737-11e6-8d5b-a76626b2b591 Version: $LATEST
[INFO]	2016-11-10T11:16:30.994Z	21583ec8-a737-11e6-8d5b-a76626b2b591	Starting new HTTPS connection (1): lambda.us-west-2.amazonaws.com
END RequestId: 21583ec8-a737-11e6-8d5b-a76626b2b591
REPORT RequestId: 21583ec8-a737-11e6-8d5b-a76626b2b591	Duration: 3002.54 ms	Billed Duration: 3000 ms 	Memory Size: 128 MB	Max Memory Used: 22 MB	
2016-11-10T11:16:33.977Z 21583ec8-a737-11e6-8d5b-a76626b2b591 Task timed out after 3.00 seconds

This is running under a VPC and I set the security group to accept all inbound and outbound connection. I use arn:aws:iam::aws:policy/AWSLambdaFullAccess manage role for both of them.

Am I missing something here?

[jgardezi]

I am running Lambda as Kinesis consumer and invoking function in itself.

called_function = context.invoked_function_arn

lambda_client = boto3.client('lambda', region_name='my-region')
        lambda_client.invoke(
            FunctionName=called_function,
            InvocationType='Event',
            Payload=bytes(json.dumps(event_to_send))
        )

[zkanda]

@jgardezi as it turns out, my problem was I was running it on a public subnet, and lambda doesn’t have an elastic ip to use internet gateway. So switching to private subnet with a nat solves my problem. I hope that helps you or have more clue about your problem.