我的微服务中, activemq 消费 一条消息的时候, 出了错, 结果导致了 那条消息就一直处于pending 状态,
queue.user.545c2ed5-fee7-482a-bb59-564bbaa593f8_c5cdc461-4e9c-48c5-8684-6a81571114b8 1 1 0 0 点击去是这样的: Browse queue.user.545c2ed5-... Message ID Correlation ID Persistence Priority Redelivered Reply To Timestamp Type Operations ID:dce4f74976e7-34120-1531388605944-1:4:1:1:1 Persistent 4 true 2018-07-12 09:43:31:554 UTC Delete
可以看到 pending 是1 , dequeue 是0 , 而消费者是1, 明明存在1个消费者, 但是却一直不消费, 不dequeue 是什么意思?? 本想直接在那个管理界面上点击 delete 操作的, 但是想想, 哥也好歹是程序员, . 我决定写个程序来消费他..
/** * * 队列操作 */ public static void consume() throws JMSException { Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE); String qu = null; qu = "queue.user.545c2ed5-fee7-482a-bb59-564bbaa593f8_c5cdc461-4e9c-48c5-8684-6a81571114b8"; Queue queue = session.createQueue(qu); MessageConsumer consumer = session.createConsumer(queue); System.out.println("consumer = " + consumer); consumer.setMessageListener(new MessageListener() { @Override public void onMessage(Message message) { System.out.println("message00 ============ " + message); try { message.acknowledge(); } catch (JMSException e) { e.printStackTrace(); } } }); }
程序运行没错, 但是, 我的 MessageListener 似乎不起作用, message00 ============ 始终不打印出来. 我也是郁闷了, 这么简单的程序都有错啊, 我写过很多次的好吧, 网上疯狂搜索一把, 好像大家都是这样写的啊.. 坑爹了啊..
不同于topic, queue 是可以先生产, 后面再消费的吧,,queue 并没有生产者消费者时间先后顺序的限制, 难道哪里记错了? 各种找资料, 发现并不是这样的..
难不成activemq 已经报错了? 看下日志吧:
2018-04-13 05:11:03,574 CRIT Supervisor running as root (no user in config file) 2018-04-13 05:11:03,581 WARN Included extra file "/etc/supervisor/conf.d/activemq.conf" during parsing 2018-04-13 05:11:03,581 WARN Included extra file "/etc/supervisor/conf.d/cron.conf" during parsing 2018-04-13 05:11:03,744 INFO RPC interface 'supervisor' initialized 2018-04-13 05:11:03,744 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2018-04-13 05:11:03,749 INFO supervisord started with pid 1 2018-04-13 05:11:04,751 INFO spawned: 'cron' with pid 16 2018-04-13 05:11:04,753 INFO spawned: 'activemq' with pid 17 2018-04-13 05:11:06,102 INFO success: cron entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-04-13 05:11:06,102 INFO success: activemq entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-04-13 07:09:36,530 WARN received SIGTERM indicating exit request 2018-04-13 07:09:36,530 INFO waiting for cron, activemq to die 2018-04-13 07:09:37,533 INFO stopped: activemq (terminated by SIGTERM) 2018-04-13 07:09:37,534 INFO stopped: cron (terminated by SIGTERM) 2018-04-13 07:11:36,201 CRIT Supervisor running as root (no user in config file) 2018-04-13 07:11:36,201 WARN Included extra file "/etc/supervisor/conf.d/activemq.conf" during parsing 2018-04-13 07:11:36,201 WARN Included extra file "/etc/supervisor/conf.d/cron.conf" during parsing 2018-04-13 07:11:36,258 INFO RPC interface 'supervisor' initialized 2018-04-13 07:11:36,260 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2018-04-13 07:11:36,260 INFO supervisord started with pid 1 2018-04-13 07:11:37,263 INFO spawned: 'cron' with pid 16 2018-04-13 07:11:37,265 INFO spawned: 'activemq' with pid 17 2018-04-13 07:11:38,737 INFO success: cron entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-04-13 07:11:38,738 INFO success: activemq entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-05-03 03:42:11,945 WARN received SIGTERM indicating exit request 2018-05-03 03:42:11,959 INFO waiting for cron, activemq to die 2018-05-03 03:42:12,971 INFO stopped: activemq (terminated by SIGTERM) 2018-05-03 03:42:12,973 INFO stopped: cron (terminated by SIGTERM) 2018-05-03 03:44:23,724 CRIT Supervisor running as root (no user in config file) 2018-05-03 03:44:23,727 WARN Included extra file "/etc/supervisor/conf.d/activemq.conf" during parsing 2018-05-03 03:44:23,728 WARN Included extra file "/etc/supervisor/conf.d/cron.conf" during parsing 2018-05-03 03:44:23,824 INFO RPC interface 'supervisor' initialized 2018-05-03 03:44:23,824 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2018-05-03 03:44:23,824 INFO supervisord started with pid 1 2018-05-03 03:44:24,830 INFO spawned: 'cron' with pid 16 2018-05-03 03:44:24,831 INFO spawned: 'activemq' with pid 17 2018-05-03 03:44:26,254 INFO success: cron entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-05-03 03:44:26,254 INFO success: activemq entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-07-16 09:35:45,450 CRIT Supervisor running as root (no user in config file) 2018-07-16 09:35:45,458 WARN Included extra file "/etc/supervisor/conf.d/activemq.conf" during parsing 2018-07-16 09:35:45,458 WARN Included extra file "/etc/supervisor/conf.d/cron.conf" during parsing 2018-07-16 09:35:45,472 INFO RPC interface 'supervisor' initialized 2018-07-16 09:35:45,472 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2018-07-16 09:35:45,472 INFO supervisord started with pid 1 2018-07-16 09:35:46,474 INFO spawned: 'cron' with pid 16 2018-07-16 09:35:46,475 INFO spawned: 'activemq' with pid 17 2018-07-16 09:35:47,773 INFO success: cron entered RUNNING state, process has stayed up for > than 1 seconds (startsecs) 2018-07-16 09:35:47,773 INFO success: activemq entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
似乎也并没有上面特别的, CRIT 是什么? 好像很严重的样子, 感觉还是可以忽略的吧..
http://activemq.2283324.n4.nabble.com/Messages-stuck-in-pending-state-in-queue-td4669239.html 好像是版本问题唉, 难道?
http://activemq.2283324.n4.nabble.com/Messages-are-kept-in-Pending-queue-for-durable-topic-subscribers-td4690015.html 看的晕晕的
https://stackoverflow.com/questions/7786086/difference-between-pending-messages-and-enqueue-counter-in-active-mq : 提到
pending messages = number of messages CURRENTLY waiting for delivery in the destination (the current size of the queue) enqueued messages = number of messages that where enqueued in the destination since the last statistic reset. This number can only rise. dequeued messages = messages delivered from the destination to consumers. this number can be higher that the number of enqueued messages if a message was delivered to multiple consumers (topics).
好像并没什么卵用..
天啊, 明明两个消费者, 但是却一直不消费, 不dequeue 是几个意思?
仔细一看, 此时的消费者是2, 那就是说, 还有其他消费者?
queue.user.545c2ed5-fee7-482a-bb59-564bbaa593f8_c5cdc461-4e9c-48c5-8684-6a81571114b8 1 2 0 0
突然意识到是我的微服务还在运行, 难道它阻塞了其他消费者对当前queue的消费? 赶紧把 微服务 关闭, 再次运行上面程序, 搞定了!