AWS Lambda timeout with external dependencies

Hi,

I am having issues with a Lambda function which has external dependencies. The function will be triggered by a API Gateway call. When the function is deployed without external dependencies it works fine. However, when i use external dependencies (eg: in the function, for testing purposes i check if the port of a RDS instance is listening) a timeout occurs.

When i remove the reference to the library which i imported, but leave the import the function executes without a timeout. I have tried different things, but to no avail. I also created a layer in Lambda, which has the dependencies, but also when i reference a library which is contained in that layer, the timeout occurs again.

Do you have any suggestions / help? Below my (very simple) source code.

` import json import socket import boto3 import pg8000

import sys

sys.path.insert(0, '/vendor') from botocore.exceptions import ClientError import pg8000.native

def hello(event, context): secret_name = "dev/studieplanning_dev" region_name = "eu-north-1"

# Create a Secrets Manager client
session = boto3.session.Session()
client = session.client(
    service_name='secretsmanager',
    region_name=region_name
)

try:
    get_secret_value_response = client.get_secret_value(
        SecretId=secret_name
    )
except ClientError as e:
    # For a list of exceptions thrown, see
    # https://docs.aws.amazon.com/secretsmanager/latest/apireference/API_GetSecretValue.html
    raise e

# Decrypts secret using the associated KMS key.
secret = get_secret_value_response['SecretString']
object = json.loads(secret)
print(object['username'])
print(object['host'])
print(object['port'])

dsn = "dbname=" + object['dbInstanceIdentifier'] + " user=" + object['username'] + " password=" + object['password'] + " host=" + object['host']
try:
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    result = sock.connect_ex((object['host'], object['port']))
    if result == 0:
        print
        "Port is open"
    else:
        print
        "Port is not open"
    sock.close()

body = {
    "message": "Go Serverless v1.0! Your function executed successfully!",
    "input": event
}

response = {
    "statusCode": 200,
    "body": json.dumps(body)
}

return response

`