def unresponsive_dbhost_count(db_host)
      begin
        count = $hijacker_redis.hget( redis_keys(:unresponsive_dbhosts), db_host) unless db_host.nil?
        (count or 0).to_i
      rescue
        0
      end
    end
def unresponsive_dbhost_count(db_host)
      begin
        count = $hijacker_redis.hget( redis_keys(:unresponsive_dbhosts), db_host) unless db_host.nil?
        (count or 0).to_i
      rescue
        0
      end
    end
Get the current count for the number of times requests were not able to
 connect to a given database host