# TCP Puzzlers

- **期号**: SRE Weekly Issue #42（2016-10-02）
- **作者**: —
- **链接**: https://www.joyent.com/blog/tcp-puzzlers

## 简介

Think you know how TCP works? There are sneaky edge-cases that can cause an outage if you don’t know about them. Example: a MySQL replicating slave will happily report “0 seconds behind master” indefinitely while waiting on a connection to the master that’s long-since silently failed.

## 正文

> ⚠️ 抓取失败：HTTP 404