[ 
https://issues.apache.org/jira/browse/AMQ-9654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18039677#comment-18039677
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Matt Pavlovich commented on AMQ-9654:
-------------------------------------

Add'l log message from recent Apache CI run:

{noformat}
[ERROR] Tests run: 22, Failures: 5, Errors: 0, Skipped: 0, Time elapsed: 19.68 
s <<< FAILURE! -- in 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest
[ERROR] 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario[sendDupToDLQ=false,cacheEnable=true,auditEnabled=true,optimizedDispatch=true]
 -- Time elapsed: 0.608 s <<< FAILURE!
java.lang.AssertionError: expected:<0> but was:<1>
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.doProcessSendDuplicateFromStoreToDLQ(SendDuplicateFromStoreToDLQTest.java:172)
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario(SendDuplicateFromStoreToDLQTest.java:134)
[ERROR] 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario[sendDupToDLQ=false,cacheEnable=true,auditEnabled=false,optimizedDispatch=false]
 -- Time elapsed: 0.528 s <<< FAILURE!
java.lang.AssertionError: expected:<0> but was:<1>
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.doProcessSendDuplicateFromStoreToDLQ(SendDuplicateFromStoreToDLQTest.java:172)
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario(SendDuplicateFromStoreToDLQTest.java:134)
[ERROR] 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario[sendDupToDLQ=false,cacheEnable=false,auditEnabled=true,optimizedDispatch=true]
 -- Time elapsed: 0.595 s <<< FAILURE!
java.lang.AssertionError: expected:<0> but was:<1>
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.doProcessSendDuplicateFromStoreToDLQ(SendDuplicateFromStoreToDLQTest.java:172)
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario(SendDuplicateFromStoreToDLQTest.java:134)
[ERROR] 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario[sendDupToDLQ=null,cacheEnable=null,auditEnabled=null,optimizedDispatch=null]
 -- Time elapsed: 0.561 s <<< FAILURE!
java.lang.AssertionError: expected:<0> but was:<1>
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.doProcessSendDuplicateFromStoreToDLQ(SendDuplicateFromStoreToDLQTest.java:172)
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario(SendDuplicateFromStoreToDLQTest.java:134)
[ERROR] 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario[sendDupToDLQ=false,cacheEnable=true,auditEnabled=false,optimizedDispatch=false]
 -- Time elapsed: 0.654 s <<< FAILURE!
java.lang.AssertionError: expected:<0> but was:<1>
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.doProcessSendDuplicateFromStoreToDLQ(SendDuplicateFromStoreToDLQTest.java:172)
        at 
org.apache.activemq.broker.policy.SendDuplicateFromStoreToDLQTest.testSendDuplicateFromStoreToDLQScenario(SendDuplicateFromStoreToDLQTest.java:134)
{noformat}

> Queue size incorrect even when queue is empty
> ---------------------------------------------
>
>                 Key: AMQ-9654
>                 URL: https://issues.apache.org/jira/browse/AMQ-9654
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.17.6
>            Reporter: Matt Pavlovich
>            Assignee: Matt Pavlovich
>            Priority: Major
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Environment:
> Linux OS
> ActiveMQ 5.17.6 using network of brokers (2-3 brokers per cluster) 
> Cloud deployment with high frequency of network inconsistency
> 1. Queue size may reflect a small number of messages are still pending on the 
> queue (1 or 2), but there are no messages present. 
> 2. Broker restart corrects the messages
> 3. No clear indications of exception or error in broker or client-side logs
> 4. Application consuming messages using multiple consumers and 
> single-message-per-transaction using local transaction ack mode. (Camel JMS, 
> Spring, etc)
> 5. Across dozens of brokers processing 100's of millions of messages per 
> year, this will occur a handful of times in all.
> Suspect queue size counter consistency issue.



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