Topic messages enqueued X but dequeued is less than the X

[devMQ <ma...@outlook.com>]

Having a simple topic created for 1 consumer subscription, sending X no. of
messages from producer but only (X-y) no. of messages are getting consumed
in the onMessage(). The admin console attached below:
<http://activemq.2283324.n4.nabble.com/file/n4677450/ActiveMQ.snapshot.png> 

Have tried to acknowledge using explicitly client ack also played around the
setting in the activemq.xml file too: some changes done 

 <pendingMessageLimitStrategy>
                    <constantPendingMessageLimitStrategy limit="50"/>
                  </pendingMessageLimitStrategy>


<systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage limit="64 mb"/>
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="100 gb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="10 gb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>

 <transportConnectors>
            
            
            <transportConnector name="stomp"
uri="tcp://localhost:61616?maximumConnections=1000&amp;wireformat.maxFrameSize=104857600"/>
            <transportConnector name="amqp"
uri="amqp://localhost:5672?maximumConnections=1000&amp;wireformat.maxFrameSize=104857600"/>
        </transportConnectors>

Not sure where the message are getting lost! Some runs give the desired
result - no. of messages  enqueued = no. of messages dequeued. And have the
processing done right in the onMessage().

Any suggestions / thoughts here is appreciated here. (Hope i have
articulated well to understand the issue i am facing)..


Thanks in Advance :)
Maurya






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