消息質量平臺系列文章|全鏈路排查篇

{"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":"閒魚每天流轉的消息量級過億，觸達一半的用戶，由於二手商品的性質，閒魚用戶需要通過聊天進一步瞭解寶貝成色，進行商品價格協商等，消息作爲閒魚的基礎功能，在促進商品成交中起到很大的作用。同時在閒魚，買賣雙方通常是個人用戶，是否在線存在非常大的不確定性，消息觸達一旦出現問題，就有可能影響到商品成交，甚至還會出現引流到微信進行欺詐的情況，因此急需通過有效手段爲用戶提供穩定可靠的消息服務。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"問題定義"}]},{"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":"在消息領域，從用戶角度來說，問題現象主要是消息丟失、消息觸達延遲等。從技術上來說丟消息的根因是端上架構設計，即有通過服務端接口拉消息，也有accs長連接通道下發消息，當有大量消息同時到達客戶端時，消息合併或落庫異常則會被丟棄掉，導致用戶消息丟失。而在線消息延遲，更多是accs通道延遲和阻塞導致。"}]},{"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":"但閒魚消息因爲收發鏈路長，服務端和客戶端上實現的處理邏輯複雜，還涉及第三方通道，所以面臨三個主要問題："}]},{"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":"如何在上線前儘早發現問題？"}]}]},{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"線上出現問題如何快速發現？"}]}]},{"type":"listitem","attrs":{"listStyle":null},"content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"輿情問題如何有效定位？"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}}]}