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Date: Thu, 9 Feb 2012 09:10:59 +0000 (UTC)
From: "William (Commented) (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
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Subject: [jira] [Commented] (AMQ-3697) Messages not delivered to connecter
 consumer
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    [ https://issues.apache.org/jira/browse/AMQ-3697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204375#comment-13204375 ] 

William commented on AMQ-3697:
------------------------------

I changed my config in order to not reach the prefetch limit (limit is very high) and put a thread pool in order to process messages on the consumer side (the message listener only submit a task to the thread pool and ack).

Did you have any issue about a consumer that stop sendings acks ? From my understanding the only thing that can make the broker buffer messages is that the acks are not send back, am I right ?

Thanks.
                
> Messages not delivered to connecter consumer
> --------------------------------------------
>
>                 Key: AMQ-3697
>                 URL: https://issues.apache.org/jira/browse/AMQ-3697
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.5.1
>         Environment: SunOS 5.10 Generic_142909-17 sun4v sparc SUNW,T5140
>            Reporter: William
>            Priority: Critical
>
> I am using ActiveMQ 5.5.1 and sometimes messages are not dispatched to connected consumers. 
> A single broker is used. No transaction and no persistence is used for message delivery. Message consumers are spring template made for topic consuption. Optimize acknowledge is enabled and acknowledgment is auto.
> By Looking at JMX Topic MBean I can see that messages are received but not dispatched (and of course non depueued). I noticed that disptatched count was 100 more than dequeue count.
> From JMX : 
> * Received count : 4502
> * Dispatched count : 3756
> * Dequeued count : 3656
> If a start a new consumer on the same topic, the messages are only dispatched to the new consumer while the older one is still seen as connected (consumer count on the mbean is 2). Once the problem appear the only solution is to restart the consumer or the activemq instance.
> It seems that even if the consumer is seen as connected, messages as not dispatched for an unknow reason. 
> Which logs can I enable in order to diagnose the problem (on activemq side and/or consumer side) ? I have already made a thread dump, not thread are blocke

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