我有一个类似的问题，只是你的工作'test_3'持续太长，超过5秒（或2分钟，你试过）。
APScheduler正在尝试重新执行您的工作，但前一个工作仍在运行。

I had a similar problem, and it turned out it was just your job 'test_3' lasting too long, more then 5 secs (or 2 minutes as you tried). APScheduler is trying to re-execute you job, but the previous one is still running.