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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1845) Message loss in network of brokers when network connection break
Date Tue, 29 Jul 2008 13:30:01 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-1845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44605#action_44605
] 

Gary Tully commented on AMQ-1845:
---------------------------------

The problem is that the consumer uses a transacted session but does not commit the transaction.
If you examine the consumer broker using the jmx/jconsole, you will see that the queue has
all its messages inflight, delivered but not acked. They won't be committed till the transaction
associated with the cached consumer session is committed.

Spring jms template does quite a bit of work under the hood, it may may make sense to strip
your test application down to pure jms api calls. 
In any event, to proceed further with your testing, for your test consumer DefaultMessageListenerContainer
configuration use the following:
{code}
<bean id="listenerContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer">
		<property name="connectionFactory" ref="jmsFactory" />
		<property name="destinationName" value="test-out" />
		<property name="messageListener" ref="listener" />
		<property name="sessionTransacted" value="false" />
	</bean>
{code}
That is, do not use a transacted session. (Or stick with a transacted session but commit the
transaction in your listener via session.commit or via the springjms prescribed way.)


> Message loss in network of brokers when network connection break
> ----------------------------------------------------------------
>
>                 Key: AMQ-1845
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1845
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.1.0
>         Environment: Two brokers connected via TCP with one persistent distributed queue
and a producer and a consumer on each broker.
>            Reporter: Bryan Shaw
>            Assignee: Gary Tully
>
> Producer on broker A send 2500 message on the distributed queue at broker A.
> Producer B starts to receive message from distributed queue on broker B.
> During the receiving process, the network between these two brokers down and later brought
up again.
> In this senario, we found that some messages are lost. 
> It seems the broker A are sending message to broker B when the network is down and these
messages are removed from queue in broker A but never received by broker B which causing message
loss.
> Is this a bug or a configuration problem? 
> I thought the configuration like this is the store/forward pattern which should ensure
the message reliability in an unstable network.

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