SQS polling fails with Signature expired after a while

Hi. My entire python code:

#!/usr/bin/env python3
import boto3


sqs = boto3.resource('sqs')
queue = sqs.get_queue_by_name(QueueName='my-queue-name')
print(queue.url)

while True:
    for message in queue.receive_messages(WaitTimeSeconds=20):
        print(message.body)
        message.delete()

At first it works beautifully:

{"Service":"Amazon S3","Event":"s3:TestEvent","Time":"2015-07-23T08:20:16.700Z","Bucket":"my-bucket","RequestId":"1A77AE35967318B6","HostId":"Y3X<shortened>kK2"}

After a while it fails and cannot be started again with same credentials.

Traceback (most recent call last):
  File "./app.py", line 6, in <module>
    queue = sqs.get_queue_by_name(QueueName='my-queue-name')
  File "/usr/local/lib/python3.4/site-packages/boto3/resources/factory.py", line 343, in do_action
    response = action(self, *args, **kwargs)
  File "/usr/local/lib/python3.4/site-packages/boto3/resources/action.py", line 77, in __call__
    response = getattr(parent.meta.client, operation_name)(**params)
  File "/usr/local/lib/python3.4/site-packages/botocore/client.py", line 269, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "/usr/local/lib/python3.4/site-packages/botocore/client.py", line 323, in _make_api_call
    raise ClientError(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (SignatureDoesNotMatch) when calling the GetQueueUrl operation: Signature expired: 20150723T103511Z is now earlier than 20150723T130218Z (20150723T131718Z - 15 min.)

This is right from the tutorial at http://boto3.readthedocs.org/en/latest/guide/sqs.html#processing-messages

[Vasile-Ciorna]

docker restart solved this issue for me

[stanislavb]

Hi. It is a quite obscure situation since I was running boto code in a docker container running in a boot2docker VM using Virtualbox on Mac OSX on a laptop which went to sleep. It’s really hard to know what combination went wrong here, so let’s close this ticket.