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From "C Velo (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (AMQ-2887) Seeing negative numbers in the "Number Of Pending Messages" column in the web console
Date Thu, 09 Sep 2010 00:32:41 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-2887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=61738#action_61738
] 

C Velo edited comment on AMQ-2887 at 9/8/10 8:32 PM:
-----------------------------------------------------

I can also see the negative queue counts in JConsole as well.

Haven't been able to reproduce a test case with this using JMeter, however,
I have been able to reproduce this via using an in-house test script which
puts large #'s of our application-specific messages on the application queues,
which are then pulled off by application consumers which also do database work.

+Scenario:+
            • Producers: 3
            • Brokers (network of brokers): 2
            • Consumers (application consumers): 2

Our message sizes are small - all of them under 1k.

----

To reproduce, start up multiple Producers, both of which are throwing 80,000+ messages
at two brokers (which are networked together) and have the two consumers running on 
separate servers pulling items off of the application queue.

----

+NetworkConnector snippet:+
{code}
        <networkConnector name="ActiveMQ Cluster" uri="static:(tcp://broker1:61616,tcp://broker2:61616,tcp://broker3:61616)"
\
conduitSubscriptions="false" \
dynamicOnly="true" \
decreaseNetworkConsumerPriority="false" \
suppressDuplicateQueueSubscriptions="true" \
duplex="true" \
networkTTL="5"/>
        </networkConnectors>
{code}



      was (Author: cvelo):
    I can also see the negative queue counts in JConsole as well.

Haven't been able to reproduce a test case with this using JMeter, however,
I have been able to reproduce this via using an in-house test script which
puts large #'s of our application-specific messages on the application queues.

+Scenario:+
            • Producers: 3
            • Brokers (network of brokers): 2
            • Consumers (application consumers): 2

Our message sizes are small - all of them under 1k.

----

To reproduce, start up multiple Producers, both of which are throwing 80,000+ messages
at two brokers (which are networked together) and have the two consumers running on 
separate servers pulling items off of the application queue.

----

+NetworkConnector snippet:+
{code}
        <networkConnector name="ActiveMQ Cluster" uri="static:(tcp://broker1:61616,tcp://broker2:61616,tcp://broker3:61616)"
\
conduitSubscriptions="false" \
dynamicOnly="true" \
decreaseNetworkConsumerPriority="false" \
suppressDuplicateQueueSubscriptions="true" \
duplex="true" \
networkTTL="5"/>
        </networkConnectors>
{code}


  
> Seeing negative numbers in the "Number Of Pending Messages" column in the web console
> -------------------------------------------------------------------------------------
>
>                 Key: AMQ-2887
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2887
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.4.0
>         Environment: Linux 2.6.18-128.1.10.el5.xs5.5.0.51xen #1 SMP Wed Nov 11 07:38:08
EST 2009 i686 i686 i386 GNU/Linux
>            Reporter: C Velo
>         Attachments: activemq_broker1.xml, pubd-amq3_negative_counts.pdf
>
>
> Seeing negative numbers in the "Number Of Pending Messages" column in the web console:
> ibsys.content.publication	-9771	262	1192568	1202339

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