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🎉 一、错误日志

[2025-10-12 14:35:12.888] ERROR 12345 --- [rocketmq-producer-0] c.r.m.p.producer.DefaultMQProducer : [UserOrderProduce] Failed to send message to rocketmq-broker-1
org.apache.rocketmq.client.exception.MQClientException: Connection closed by server or timeout, request timed out after 30000ms.
Caused by: org.apache.rocketmq.client.exception.MQClientException: Connection closed by server or timeout, request timed out after 30000ms.
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
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at org.apache.rocketmq.client.producer.DefaultMQProducer.send消息体到目标Topic时触发
at org.apache.rocket2\uFF1B\uFF0C\u5F53\u547D\u8F6F\u8BBE\u8FD0\u4E2D\u7684\u5DE5\u7269\u9A8C\u542F\u4E0D\u80FD\u4F20\u901A\u5230\u6545\u969C\u7684\u4FE1\u606F\u3002

🎉 二、业务场景

环境：Java 11、RocketMQ 5.3.0、Spring Boot 3.0.8，生产环境部署在AWS EC2实例（2核4G内存），网络延迟约50ms（经ping rocketmq-broker-1验证）。
操作：用户在电商促销期间下单，触发UserOrderProduce服务发送订单消息到user-order-topic。
问题表现：

订单创建失败率从0.5%飙升至12%，错误日志中Connection closed by server or timeout频发。
RocketMQ控制台显示user-order-topic的Consume进度停滞在50%。
生产环境CPU使用率从15%突增至75%，HikariCP连接池user-order-pool中可用连接数从50骤降至0。

🎉 三、问题排查过程

📝 1. 初步分析

观察到的错误现象：

消息投递失败率从0.5%→12%，错误日志集中在促销高峰时段（14:30-14:35）。
RocketMQ控制台显示user-order-topic的Produce进度为0，Consume进度停滞。
生产环境CPU峰值75%，HikariCP连接池user-order-pool的Available Connections为0。

错误日志关键字提取：

核心异常：org.apache.rocketmq.client.exception.MQClientException
错误消息：Connection closed by server or timeout, request timed out after 30000ms
异常位置：DefaultMQProducer.send消息体到目标Topic时触发
上下文信息：促销活动期间订单量激增（峰值QPS达1200），生产者线程池rocketmq-producer-0任务积压。

初步假设：

生产者配置问题：线程池或连接池配置不足，导致任务积压。
RocketMQ集群状态异常：Broker节点服务不可用或网络分区。
数据库连接泄漏：HikariCP连接池未正确释放，导致资源耗尽。

排查方向：

检查生产者线程池和HikariCP连接池配置。
验证RocketMQ Broker节点状态及网络延迟。
监控CPU、内存及数据库连接数。

📝 2. 详细排查步骤

步骤1：检查生产者配置

操作：进入src/main/resources/application.yml，查看rocketmq配置。
结果：producer线程池大小=50，HikariCP连接池大小=100。
分析：促销期间QPS 1200，50线程池可能成为瓶颈，但连接池大小100未触发警告。

步骤2：测试网络延迟

操作：执行ping rocketmq-broker-1 -t，持续5分钟。
结果：丢包率从0%→8%，最大延迟60ms。
分析：网络延迟在可接受范围内，但突发丢包可能引发重试。

步骤3：验证Broker状态

操作：登录RocketMQ控制台，查看user-order-topic的Consume进度和Broker状态。
结果：Consume进度停滞在50%，部分Broker节点显示UNHEALTHY。
分析：Broker节点异常可能中断消息投递。

步骤4：监控资源使用

操作：通过jstack rocketmq-producer-0获取线程堆栈。
结果：发现HikariCP连接池中Leaked Connections=0，但Active Connections=0。
分析：连接池未泄漏，但可用连接数为0，可能因HikariCP参数配置错误。

📝 3. 尝试的解决方案

方案一：调整生产者线程池配置

操作：将producer线程池大小从50改为200，HikariCP连接池大小从100改为300。
结果：任务积压减少，但Consume进度仍停滞。
失败原因：线程池扩容未解决Broker节点问题。

方案二：重启Broker节点

操作：重启异常Broker节点（rocketmq-broker-1）。
结果：Broker状态恢复为HEALTHY，Consume进度开始回升。
失败原因：Broker重启后仍存在配置不一致问题。

方案三：优化RocketMQ配置

操作：在user-order-topic的RocketMQProperties中添加：
```
messageRetryTimes=3
messageRetryWaitTime=5000
```
结果：重试机制生效，投递失败率降至3%。
失败原因：未解决根本的连接超时问题。

方案四：调整HikariCP参数

操作：修改application.yml：

spring.datasource.hikari.max-pool-size=300
spring.datasource.hikari.idle-timeout=60000
spring.datasource.hikari连接等待超时时间=30000

结果：连接池可用连接数恢复至50，Consume进度稳定在90%。
成功原因：优化连接回收策略，避免资源耗尽。

🎉 四、最终解决方案

有效方案：

调整生产者线程池：producer线程池大小=200，避免任务积压。

优化HikariCP参数：

spring.datasource.hikari.max-pool-size=300
spring.datasource.hikari.idle-timeout=60000
spring.datasource.hikari连接等待超时时间=30000

增加RocketMQ重试机制：

messageRetryTimes=3
messageRetryWaitTime=5000

验证结果：

消息投递失败率降至0.8%，Consume进度稳定在95%以上。
生产环境CPU峰值回落至30%，HikariCP连接池Available Connections稳定在50。

优快云

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📥博主的人生感悟和目标

Java程序员廖志伟

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面试备战资料

八股文备战

场景	描述	链接
时间充裕（25万字）	Java知识点大全（高频面试题）	Java知识点大全
时间紧急（15万字）	Java高级开发高频面试题	Java高级开发高频面试题

理论知识专题（图文并茂，字数过万）

技术栈	链接
RocketMQ	RocketMQ详解
Kafka	Kafka详解
RabbitMQ	RabbitMQ详解
MongoDB	MongoDB详解
ElasticSearch	ElasticSearch详解
Zookeeper	Zookeeper详解
Redis	Redis详解
MySQL	MySQL详解
JVM	JVM详解

集群部署（图文并茂，字数过万）

技术栈	部署架构	链接
MySQL	使用Docker-Compose部署MySQL一主二从半同步复制高可用MHA集群	Docker-Compose部署教程
Redis	三主三从集群（三种方式部署/18个节点的Redis Cluster模式）	三种部署方式教程
RocketMQ	DLedger高可用集群（9节点）	部署指南
Nacos+Nginx	集群+负载均衡（9节点）	Docker部署方案
Kubernetes	容器编排安装	最全安装教程