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Date: Thu, 17 Jun 2010 02:39:53 -0400 (EDT)
From: "Ryan Rolland (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Commented: (AMQ-2780) ActiveMQ not preserving Message Order
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    [ https://issues.apache.org/activemq/browse/AMQ-2780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=60118#action_60118 ] 

Ryan Rolland commented on AMQ-2780:
-----------------------------------

Unsure, I did not check to see if the order violation immediately followed the delay. I would guess that it doesn't because the sequence numbers from the violations are not near multiples of 100000.

> ActiveMQ not preserving Message Order
> -------------------------------------
>
>                 Key: AMQ-2780
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2780
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.3.0
>         Environment: Windows XP, JDK 1.6.0_07
>            Reporter: Ryan Rolland
>            Assignee: Rob Davies
>            Priority: Critical
>             Fix For: 5.4.0
>
>         Attachments: BenchmarkSupport.java, Consumer.java, Producer.java
>
>
> I believe I have found a bug in message order delivery in ActiveMQ. I have taken the example benchmark consumer and producer programs and made the following modifications:
> 1)	Added a counter to keep track manually of the message order.
> 2)	Made the transmitted number of bytes per message random between 1 and 64 bytes.
> 3)	Added a random delay between 1 and 10 seconds triggered after every 100000 messages transferred on the publishing side.
> After running for a few minutes I begin to see violations in the message delivery order. In my most recent run I have counted 54 violations over the course of an hour.

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