def METHOD_NAME(self, skip_known=False):
    """
    Populate the cache of ecs tags. Can be called with skip_known=True
    If we just want to update new containers quickly (single task api call)
    (because we detected that a new task started for example)
    """
    if self.agent_url is None:
        self.log.warning("ecs-agent not found, skipping task tagging")
        return
    try:
        tasks = requests.get(self.agent_url + ECS_AGENT_TASKS_PATH, timeout=1).json()
        for task in tasks.get('Tasks', []):
            for container in task.get('Containers', []):
                cid = container['DockerId']
                if skip_known and cid in self.ecs_tags:
                    continue
                tags = ['task_name:%s' % task['Family'], 'task_version:%s' % task['Version']]
                self.ecs_tags[container['DockerId']] = tags
    except requests.exceptions.HTTPError as ex:
        self.log.warning("Unable to collect ECS task names: %s" % ex)