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https://issues.apache.org/activemq/browse/AMQ-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=57156#action_57156
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SuoNayi Wang edited comment on AMQ-2009 at 1/27/10 1:52 AM:
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I encountered the same question three times.
A standalone AMQ(5.2.0) server and three durable subscribers(because the bug
with message selector) without using selector.
It works fine usually(sending or receiving messages).
A few days later, I use one of the subscribers to send a message successfully
but the subscribers cannot receive any messages at all.
Restart the subscriber, it does not work yet.
Restart the AmqBroker, the subscribers receive the message.
But I donot know what's wrong?
I'm really crazy!
Any help ?
was (Author: wangyin):
I encounter the same question too.
A standalone AMQ(5.2.0) server and three durable subscribers(because the bug
with message selector) without using selector.
It works fine usually(sending or receiving messages).
A few days later, I use one of the subscribers to send a message successfully
but the subscribers cannot receive any messages at all.
Restart the subscriber, it does not work yet.
Restart the AmqBroker, the subscribers receive the message.
But I donot know what's wrong?
I'm really crazy!
Any help ?
> Problem with message dispatch after a while
> -------------------------------------------
>
> Key: AMQ-2009
> URL: https://issues.apache.org/activemq/browse/AMQ-2009
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.1.0, 5.2.0
> Reporter: Rajani Chennamaneni
> Assignee: Rob Davies
> Fix For: 5.4.0
>
> Attachments: AMQ-2009Testcase2.zip, consumertest.zip,
> DispatchMultipleConsumersTest.java, JConsole-screenshot.jpg, testcase.zip
>
>
> Messages are not getting dispatched after a while (although it accepts new
> incoming messages) until restart of the broker. This problem is described in
> several posts.
> http://www.nabble.com/Pending-Messages-are-shown-in-ActiveMQ-td20241332.html
> http://www.nabble.com/Consumer-Listener-stop-receving-message-until-ActiveMQ-restart-td20355247.html
> http://www.nabble.com/Stuck-messages---Dispatch-issues-td20467949.html
> There was also an issue opened in Spring project for this thinking it was
> Spring problem.
> http://jira.springframework.org/browse/SPR-5110
> I am not able to reproduce with Junit test case having BrokerService started
> with in the test case. I guess I am not hitting the right stress conditions
> this way. But when I run the test case against an externally running ActiveMQ
> instance backed with oracle database persistence, it is reproducible most of
> the times. This is not a every time failure situation, it takes more time
> once than the other.
> I was able to hit this situation of stuck messages on queue using following
> scenario most of the times:
> 1) Start 2 concurrent consumers for the queue using Spring's
> DefaultMessageListenerContainer using cacheLevelName as CACHE_CONSUMER
> 2) Send messages using JMETER 2.3.2 to the queue on ActiveMQ stand alone
> broker instance with 50 threads looping 20 times.
> 3) After a while, you will notice that Spring logs that no messages are being
> received but the messages are shown jconsole of ActiveMQ and the database
> backing it for persistence.
> But in 5.2 RC3, the problem is that it dispatches duplicate messages and does
> not remove them from broker's database after acknowledge properly.
> Attached test case might help to reproduce when run against externally
> running stand alone ActiveMQ broker. Another way to see the problem is that
> try to load test using JMETER by sending messages to a queue with a camel
> route that moves messages from this queue to another and you will notice that
> it stops moving after while or copied duplicates in case of 5.2 RC3.
> Sorry about such a huge description but it is a real problem! A different
> team at our company are having this issue in production with 5.1. They are
> using it as an embedded broker with derby for persistence.
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