请教一个关于 RocketMQ 消费堵塞的问题 - V2EX
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ljmready

请教一个关于 RocketMQ 消费堵塞的问题

  •  1
     
  •   ljmready Feb 9, 2020 2879 views
    This topic created in 2290 days ago, the information mentioned may be changed or developed.

    背景: 从 rocketmq 中 10 个 queue 消费出数据,处理完后写入数据库,总体 qps 大概在 4k

    现象: 写入数据库的耗时变高后,会出现队列堵塞,并且在数据库耗时下降后,队列依旧堵塞。观察 mq 的控制面板和业务日志发现有个别 queue 会停止消费,直到手动启动 client 才会恢复消费。

    问题:

    为什么数据库耗时下降后,队列的消费进度不会逐渐恢复,而是要手动重启?

    请大佬们指点下,谢谢!

    Supplement 1    Apr 25, 2023
    应该排查 Consume Thread 的情况,检查线程池中的线程被业务逻辑堵塞住了
    3 replies    2020-02-09 20:25:02 +08:00
    find
        1
    find  
       Feb 9, 2020 via iPhone
    又有新的消息发送到了 mq 里面
    abcbuzhiming
        2
    abcbuzhiming  
       Feb 9, 2020
    你是不是参数设错了,数据库的耗时变高后,消费 client 可能因为超时而出错,多次出错后,client 可能会自动停下来,我在别的消息队列里见过这种设计
    ljmready
        3
    ljmready  
    OP
       Feb 9, 2020
    @abcbuzhiming 没见到有这种设置,我再查一下
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