Matt Pavlovich created AMQ-9654:
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             Summary: Queue size incorrect when queue is empty
                 Key: AMQ-9654
                 URL: https://issues.apache.org/jira/browse/AMQ-9654
             Project: ActiveMQ Classic
          Issue Type: Bug
            Reporter: Matt Pavlovich


Environment:
Linux OS
ActiveMQ 5.17.6

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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