消息质量平台系列文章|全链路排查篇

{"type":"doc","content":[{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"背景"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"闲鱼每天流转的消息量级过亿，触达一半的用户，由于二手商品的性质，闲鱼用户需要通过聊天进一步了解宝贝成色，进行商品价格协商等，消息作为闲鱼的基础功能，在促进商品成交中起到很大的作用。同时在闲鱼，买卖双方通常是个人用户，是否在线存在非常大的不确定性，消息触达一旦出现问题，就有可能影响到商品成交，甚至还会出现引流到微信进行欺诈的情况，因此急需通过有效手段为用户提供稳定可靠的消息服务。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"问题定义"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"在消息领域，从用户角度来说，问题现象主要是消息丢失、消息触达延迟等。从技术上来说丢消息的根因是端上架构设计，即有通过服务端接口拉消息，也有accs长连接通道下发消息，当有大量消息同时到达客户端时，消息合并或落库异常则会被丢弃掉，导致用户消息丢失。而在线消息延迟，更多是accs通道延迟和阻塞导致。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https:\/\/static001.infoq.cn\/resource\/image\/7d\/69\/7d988ebaa90164f964e92dfa721d6d69.png","alt":null,"title":"","style":[{"key":"width","value":"75%"},{"key":"bordertype","value":"none"}],"href":"","fromPaste":false,"pastePass":false}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"但闲鱼消息因为收发链路长，服务端和客户端上实现的处理逻辑复杂，还涉及第三方通道，所以面临三个主要问题："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"如何在上线前尽早发现问题？"}]}]},{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"线上出现问题如何快速发现？"}]}]},{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"舆情问题如何有效定位？"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}}]}