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From "Morteza (JIRA)" <>
Subject [jira] [Updated] (AMQ-5179) queuesize can be unreliable
Date Sun, 11 May 2014 12:33:14 GMT


Morteza updated AMQ-5179:

    Attachment: 2.png

screenshots of queue state

> queuesize can be unreliable 
> ----------------------------
>                 Key: AMQ-5179
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.9.0, 5.9.1
>         Environment: windows 8.1, centOS 6.4
>            Reporter: Morteza
>              Labels: monitoring, queue
>         Attachments: 1.png, 2.png,, activemq.xml
> We noticed that sometimes queuesize attribute of some queues are different from the count
of messages that exist in the queue. for example queuesize is 9 but there are no messages
in the queue. This issue has happened frequently so after investigation we created a test
case for the problem.
> The test case creates 5 message that each consist of an array of 1 million random bytes.
On first run it creates the 5 messages and queuesize becomes 5 as expected. On subsequent
runs the messages won't persist on queue but queue size is increased by 5.
> Now as a client the code could be improved to prevent such problem but from the perspective
of someone who wants to monitor broker states, this is a total failure since she can't know
the amount of remaining messages on a queue. 

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