title: Boto3 SQS Intermittent AccessDenied
body: <p>I have five Docker containers with identical Python codebases that concurrently pull items from an SQS queue and process them. However, I am randomly receiving crashes with the following exception on the fifth container (and occasionally the fourth):</p>
  
  <blockquote>
    <p>botocore.exceptions.ClientError: An error occurred (AccessDenied) when
    calling the ReceiveMessage operation: Access to the resource
    <a href="https://queue.amazonaws.com/" rel="nofollow noreferrer">https://queue.amazonaws.com/</a> is denied.</p>
  </blockquote>
  
  <p>I have confirmed that they all share identical AWS permissions, and the other containers have had zero crashes in the past week (and have been processing without issue)</p>
  
  <p>To me this indicates the possibility that there is a maximum number of concurrent polling connections permitted on SQS but I haven't found any indication that this is true.</p>