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From "Mark Gellings (JIRA)" <jira+amq...@apache.org>
Subject [jira] Commented: (AMQNET-294) durable subscription message loss when master broker fails to slave
Date Thu, 16 Dec 2010 17:19:03 GMT

    [ https://issues.apache.org/jira/browse/AMQNET-294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12972149#action_12972149
] 

Mark Gellings commented on AMQNET-294:
--------------------------------------

When testing with the older NMS clients all the messages come through and the NUNit test passes.
 This is even with just a prefetch of 5 in which all the messages should not have been sent
to the client.  So the test gets to 50 messages, restarts, and then message 50 and above come
through.  The test only adds messages to the received message list if the id of the message
is different, which asserts that all the unique messages came through.

 short id = Convert.ToInt16(((ActiveMQTextMessage) message).Text);
                if(!consumedMessageList.Contains(id))
                {
                    consumedMessageList.Add(id);
                }

Maybe the problem is due to a newer version of the OpenWire protocol being used?  Should an
issue be created for the java client too, or created for the broker?

What is your opinion of rolling with NMS 1.3 and ActiveMQ 5.4.2 instead of NMS 1.4.1?  We're
moving to a later version of ActiveMQ due to bug https://issues.apache.org/jira/browse/AMQ-2082.
 We have an idempotent message pattern built into our framework resting on top of NMS to detect
duplicate messages and send them through as redelivered so the clearing out of the in progress
message list may not be of concern.



> durable subscription message loss when master broker fails to slave
> -------------------------------------------------------------------
>
>                 Key: AMQNET-294
>                 URL: https://issues.apache.org/jira/browse/AMQNET-294
>             Project: ActiveMQ .Net
>          Issue Type: Bug
>          Components: NMS
>    Affects Versions: 1.4.1
>         Environment: Windows 7 (client), Windows Server 2008 64-bit (server brokers run
on), Sql Server 2008 (database)
>            Reporter: Mark Gellings
>            Assignee: Jim Gomes
>             Fix For: 1.5.0
>
>         Attachments: Apache.NMS.Test (2).zip, Apache.NMS.Test.zip, DurableConsumerTest.cs,
DurableSubscriberFailoverTest.java, NMSLog.txt, NMSLogLocalFreshCannedActiveMQ542Broker.txt,
TimsTestRevisedSlightly.zip
>
>
> We are seeing message loss on a durable subscription when using NMS ActiveMQ v1.4.1 and
ActiveMQ v5.4.1.
> Please run the included NUnit test and watch the console output.  When it says "Failover
the broker now!" do as it says.  About 75% of the time less than half of the expected 250
messages come through.
> Using version 1.1 of NMS the majority of the time the test passes.  I have seen it fail
only a few times with this earlier version, and when it does there are only a couple messages
that don't come through.
> In the zip file will be the unit test, and a config directory containing the master and
slave activemq configurations.  We are using JDBC master/slave.

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