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https://issues.apache.org/jira/browse/AMQ-3977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435949#comment-13435949
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Timothy Bish commented on AMQ-3977:
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There's no round-tripping to the broker unless you have prefetch set to zero.
The client just checks its local prefetch buffer and if a message is there its
returned if not it returns null. Depending on what prefetch you have set you
can test this out by calling a Thread.sleep before doing a receiveNoWait and
you should see similar behavior to the timed receive call you were doing. I
still don't see an issue here, please provide a test case if you think there's
a problem.
> receiveNoWait returns NULL when attempting to receive message from Virtual
> Topic
> --------------------------------------------------------------------------------
>
> Key: AMQ-3977
> URL: https://issues.apache.org/jira/browse/AMQ-3977
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 5.6.0
> Environment: Windows
> Reporter: badams
>
> Here are my steps that I performed:
> 1) Create Virtual Topic "VirtualTopic.Orders"
> 2) Create consumer "Consumer.A.VirtualTopic.Orders"
> 3) Publish persistent message to VirtualTopic.Orders (I see my message
> enqueued on my Queue)
> 4) Attempt to synchronously read the message using the receiveNoWait()
> method. This returns null.
> My current work around is using receive(timeout) method. This adds wasted
> time on my server and should be fixed.
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