Missing import from urllib3.util.ssl_ library causing AWS issues

Describe the bug After using boto3-1.20 in AWS Lambda, we are experiencing this issue: { "errorMessage": "Unable to import module 'app': cannot import name 'OP_NO_TICKET' from 'urllib3.util.ssl_' (/opt/python/urllib3/util/ssl_.py)", "errorType": "Runtime.ImportModuleError", "stackTrace": [] }

Our Lambda function is unable to start up because of this issue. We are using Python 3.8.

Steps to reproduce

import requests

from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry
from aws_requests_auth.boto_utils import BotoAWSRequestsAuth

def create_api_session(aws_host, aws_region, aws_service):
    """
    Generic api session
    """
    api_session = requests.Session()
    retries = Retry(
        total=5,
        backoff_factor=1,
        status_forcelist=[500, 502, 503, 504]
    )
    api_session.mount('https://', HTTPAdapter(max_retries=retries))
    auth = BotoAWSRequestsAuth(
        aws_host=aws_host,
        aws_region=aws_region,
        aws_service=aws_service
    )
    api_session.auth = auth
    return api_session

Expected behavior

We expect our lambda to run properly by being able to import the OP_NO_TICKET from the ssl package.

Debug logs There are no debug logs as our lambda application cannot start up.

[nateprewitt]

Hi everyone, this is a duplicate of boto/botocore#2562. We have a fix we’re working on getting released but immediate mitigation instructions are available in the linked ticket.

[github-actions[bot]]

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