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From "Torsten Mielke (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-4595) QueueBrowser hangs when browsing large queues
Date Fri, 12 Jul 2013 08:13:48 GMT

    [ https://issues.apache.org/jira/browse/AMQ-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13706779#comment-13706779
] 

Torsten Mielke commented on AMQ-4595:
-------------------------------------

Hi Tim,

Do you mind explaining a bit more why maxAuditDepth needs to be raised in order to browse
a higher number of messages? 
Also, I barely found any documentation on this property. Can we get it added to http://activemq.apache.org/per-destination-policies.html?


Would the current behavior (when not setting maxAuditDepth) not rather be a bug? From a client's
point of view should a queue browser not be used like an ordinary consumer and not require
any broker side config changes? 
I am concerned that no ActiveMQ user will think of raising maxAuditDepth in order to browse
more than the default 400 messages. This does not seem intuitive.

And finally I want to add that you also need to use version 5.9-SNAPSHOT as even the updated
test case does not work with 5.8.0. I presume due to the fix that went in for AMQ-4487?

                
> QueueBrowser hangs when browsing large queues
> ---------------------------------------------
>
>                 Key: AMQ-4595
>                 URL: https://issues.apache.org/jira/browse/AMQ-4595
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.8.0
>         Environment: All
>            Reporter: Nicholas Rahn
>            Priority: Critical
>              Labels: QueueBrowser
>         Attachments: AMQ4595Test.java, AMQ580BrowsingBug.java, amq-test-20130621T155120.log
>
>
> When trying to browse a queue with a QueueBrowser, the browsing will hang and never complete.
This appears to happen only with "a lot" of message in the queue. 1000 messages works correctly,
but 10000 hangs.
> I have attached a unit test that exhibits the problem. Change the "messageToSend" variable
in the test method to see the difference between small queue size and large queue size. 
> I've attached the unit test code as well as the output from one of the runs with 10000
messages. 

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