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Date: Fri, 27 Mar 2009 03:38:43 -0700 (PDT)
From: "Yuri Ushakov (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Commented: (AMQ-1940) Negative queue size (reproducible)
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    [ https://issues.apache.org/activemq/browse/AMQ-1940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=50862#action_50862 ] 

Yuri Ushakov commented on AMQ-1940:
-----------------------------------

We have the same problem with 5.2.0.  A queue, single consumer, single producer.  We have -1 pending now, 1616 sent, 1617 received.

> Negative queue size (reproducible)
> ----------------------------------
>
>                 Key: AMQ-1940
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1940
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.2.0
>         Environment: Found on Windows but reproduced under Linux
>            Reporter: Vadim Chekan
>            Assignee: Rob Davies
>            Priority: Critical
>             Fix For: 5.2.0
>
>         Attachments: Main.java, Picture 6.png, QueuePurgeTest.java.diff.txt
>
>
> When you "purge" queue from web admin console, it zeroes queue message
> counter. But if you have an active consumer at that time which
> pre-fetched messages than your consumer will keep sending ack as it
> process messages from its buffer. ActiveMQ will keep decrement counter
> upon receiving each ack. So when consumer is done queue will show
> MINUS<consumer buffer size>.

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