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https://issues.apache.org/jira/browse/AMQ-1940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14316127#comment-14316127
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Sergey commented on AMQ-1940:
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I've just created AMQ-5576, and where is a route test case.
Just deploy this route, and send 1 message into inbound queue using web
console, it should be enough to reproduce some of issues with counters/sizes.
> Negative queue size (reproducible)
> ----------------------------------
>
> Key: AMQ-1940
> URL: https://issues.apache.org/jira/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: 5.3.0
>
> 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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