消息队列RocketMQ版延迟-阿里云

[帮助文档] 如何处理消息队列RocketMQ版消息堆积和延迟问题

本文主要介绍云消息队列 RocketMQ 版TCP协议的Java客户端使用过程中，经常会出现的消息堆积和消息延迟的问题。通过了解云消息队列 RocketMQ 版客户端的消费原理和消息堆积的主要原因，帮助您可以在业务部署前更好的规划资源和配置，或在运维过程中及时调整业务逻辑，避免因消息堆积和延迟影响业...

【分布式技术专题】RocketMQ延迟消息实现原理和源码分析

痛点背景业务场景假设有这么一个需求，用户下单后如果30分钟未支付，则该订单需要被关闭。你会怎么做？之前方案最简单的做法，可以服务端启动个定时器，隔个几秒扫描数据库中待支付的订单，如果(当前时间-订单创建时间)>30分钟，则关闭订单。方案评估优点：是实现简单，缺点呢&...

rocketmq 有好用的开源的监控系统吗？比如消息延迟之类的

RocketMQ 延迟消息解析——图解、源码级解析

定义**<font color="#33aaff">延迟消息</font>：** 生产者发送消息之后，不能立刻被消费者消费，而是应该等到一定时间之后才可以被消费。**例如：** 在淘宝购物时，当用户提交一个订单之后，如果30min还没有支付的话，就给用...

一次 RocketMQ 顺序消费延迟的问题定位

一次 RocketMQ 顺序消费延迟的问题定位问题背景与现象昨晚收到了应用报警，发现线上某个业务消费消息延迟了 54s 多（从消息发送到MQ 到被消费的间隔）：2021-06-30T23:12:46.756 message processing is incredibly delayed! (Cur...

扩展RocketMQ 使其支持任意时间精度的消息延迟（2）

延迟发送逻辑根据延迟时间和当前时间差值计算延迟等级Integer level = DelayLevelCalculate.calculateDefault(l);标记该消息为延迟消息希望该消息被消费的时候若发现是延迟消息即还未到消费的时间则不消费再次的触发生产者生产一次该消息fillMess...

扩展RocketMQ 使其支持任意时间精度的消息延迟（1）

前言本想使用rocketmq的延迟消息特性，但延迟的范围有限，仅支持 1s 5s 10s 30s 1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 20m 30m 1h 2h 这18个等级，之外的延迟时间不支持，本文是为了说明如何利用rocketmq的延迟消息实现任意时间的消息延迟，如何...

RocketMQ-延迟消息

这一讲，我们主要来讲延迟消息。这一次我们结合业务来讲。业务背景在电商中，下单后，有一些用户付款后，会主动退款。也有一些用户下单后，未付款。但是这部分未付款的订单，会占用着商品库存。我们目前的电商App,下单后，会在订单表创建对应的订单数据。这些订单的状态，有一些是未付款的，...

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更新时间 2023-05-10 15:04:22

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