1. kafka 如何保证消息的有序性 2. java ThreadPoolExecutor 线程中抛出异常，运行的线程会死掉吗。。。 参考：https://segmentfault.com/a/1190000010777336
https://wizardforcel.gitbooks.io/the-art-of-programming-by-july/content/02.03.html
