问题
I have the same issue as described here: ActiveMQ: One Pending Message but Queue is empty.
Active MQ shows pending messages for the queue but when I click it it's empty.
- Further clients:
- with hawtio - same behaviour
- my java consumer
- does not consume anything
- after restart, continued to consume
We persist our messages not in default kaha db but in Oracle DB. I could see the pending messages in database in table ACTIVEMQ_MSGS.
After restart of activeMQ all clients worked as expected. In the administration console I could see the messages and the java consumer consumed the messages.
The mentioned exsiting issue was solved with an update to ActiveMQ 5.7.0. I checked the activeMQ logs but I didn't found errors or warnings. Producer for the messages was also not changed.
Any idea why I experience these issues?
回答1:
Issue is solved now. I also asked in the active mq mailing list: http://activemq.2283324.n4.nabble.com/One-Pending-Message-but-Queue-is-empty-ActiveMQ-5-12-0-td4715720.html.
First of all we added this method call in our client:
org.apache.camel.ConsumerTemplate.doneUoW(Exchange exchange)but it didn't solve the problem finally
- Furthermore we had load problems in active mq which weren't visible (healthStatus was "good" and jvm values looked also fine).
- We had too many queues in activeMQ used for logging the old messages.
- After deletion of them everything works fine now.
来源：https://stackoverflow.com/questions/38435610/activemq-one-pending-message-but-queue-is-empty-activemq-5-12-0