ValueError: time data '2019-07-18T06:43:39Z' does not match format '%Y-%m-%dT%H:%M:%S.%fZ'

[sentry-io[bot]]

We had a brief burst of these a couple of hours ago. It looks like the fractional seconds part of the timestamp is missing from the "timestamp" field in the message, which the parser is expecting:

Sentry Issue: H-1QJ

ValueError: time data '2019-07-18T06:43:39Z' does not match format '%Y-%m-%dT%H:%M:%S.%fZ'
(19 additional frame(s) were not displayed)
...
  File "kombu/messaging.py", line 590, in <listcomp>
    [callback(body, message) for callback in callbacks]
  File "h/realtime.py", line 53, in handle_message
    self._record_time_in_queue(message)
  File "h/realtime.py", line 71, in _record_time_in_queue
    message.headers["timestamp"], "%Y-%m-%dT%H:%M:%S.%fZ"
  File "_strptime.py", line 565, in _strptime_datetime
    tt, fraction = _strptime(data_string, format)
  File "_strptime.py", line 362, in _strptime
    (data_string, format))

Unexpected exception in streamer greenlet: