Investigate twilio sending empty sms messages

[xuset]

From the below traceback, it appears someone texted our number with an empty message. From what I know, most sms clients like iMessage/Android's sms, do not allow empty texts to be sent. Was an empty text actually sent?

ERROR:root:ValidationException: 400 Bad Request
{'message': 'One or more parameter values were invalid: An AttributeValue may not contain an empty string', '__type': 'com.amazon.coral.validate#ValidationException'}
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.4/dist-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/var/gator/api/gator/endpoints/sms.py", line 62, in handle_sms
    transactions.send_message(transaction, text_message_body, True, MTypes.TEXT)
  File "/var/gator/api/gator/logic/transactions.py", line 67, in send_message
    if not transaction.save():
  File "/var/gator/api/gator/core/models.py", line 144, in save
    return self.item.partial_save()
  File "/usr/local/lib/python3.4/dist-packages/boto/dynamodb2/items.py", line 410, in partial_save
    returned = self.table._update_item(key, final_data, expects=expects)
  File "/usr/local/lib/python3.4/dist-packages/boto/dynamodb2/table.py", line 852, in _update_item
    self.connection.update_item(self.table_name, raw_key, item_data, **kwargs)
  File "/usr/local/lib/python3.4/dist-packages/boto/dynamodb2/layer1.py", line 2765, in update_item
    body=json.dumps(params))
  File "/usr/local/lib/python3.4/dist-packages/boto/dynamodb2/layer1.py", line 2842, in make_request
    retry_handler=self._retry_handler)
  File "/usr/local/lib/python3.4/dist-packages/boto/connection.py", line 954, in _mexe
    status = retry_handler(response, i, next_sleep)
  File "/usr/local/lib/python3.4/dist-packages/boto/dynamodb2/layer1.py", line 2882, in _retry_handler
    response.status, response.reason, data)
boto.dynamodb2.exceptions.ValidationException: ValidationException: 400 Bad Request
{'message': 'One or more parameter values were invalid: An AttributeValue may not contain an empty string', '__type': 'com.amazon.coral.validate#ValidationException'}
172.31.32.60 - - [11/Apr/2016:01:31:59 +0000] "POST /sms/handle_sms?token=NDQzODUyNjQ2ODYwMDE2NTY4OmFwaToxNjAxNTAxNjYwOklzbHcyTHlRelBCZU1SQmFHRDNWVXcrSEJNYVRCZ1FVNEh6bUlacGdBdkk9 HTTP/1.1" 500 75 "-      " "TwilioProxy/1.1"