消息队列 CMQ

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文档中心消息队列 CMQ 消息主题（Topic）模型主题向订阅者投递消息

主题向订阅者投递消息

最近更新时间：2021-08-04 11:41:01

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主题（Topic）向订阅者投递消息的模型如下：
﻿
Topic 向订阅者投递消息时，遵循以下原则：
Topic 会尽最大努力将生产者 publish 的消息，投递（notification）到订阅者。
当投递重试多次仍失败后，消息会堆积在 Topic 中，等待下一次投递；若持续失败，将在消息最大生命周期（1天）结束后，丢弃该消息。
Topic 向订阅者投递消息失败时，可能的原因如下：
投递消息时需要提供 SecretId 和 SecretKey（需要持久密钥），可在 API 密钥管理 中获取。
订阅需要使用根账号创建，不能用子账号。
如果队列名称不存在，请在 CMQ 控制台 检查队列是否存在。

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