def is_blacklisted(self, appid, crawlid):
        key_check = '{appid}||{crawlid}'.format(appid=appid,
                                                crawlid=crawlid)
        redis_key = self.spider.name + ":blacklist"
        return self.redis_conn.sismember(redis_key, key_check)
Checks the redis blacklist for crawls that should not be propagated
dataset/ETHPy150Open istresearch/scrapy-cluster/crawler/crawling/distributed_scheduler.py/DistributedScheduler.is_blacklisted