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From "Bryan Shaw (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1845) Message loss in network of brokers when network connection break
Date Fri, 18 Jul 2008 03:12:00 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-1845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44370#action_44370
] 

Bryan Shaw commented on AMQ-1845:
---------------------------------

Nop, we didn't set the delivery mode attibute on the producer which means according to the
JMS API it is default to DeliveryMode.PERSISTENT.
Every message is successfullly persistented in the local broker on the producer side if the
network is down before producer sending activity begins.
But if network is down when message is transfering between two brokers, there is always message
loss. 


> 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
>
> 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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