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https://issues.apache.org/jira/browse/ARTEMIS-4301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17846286#comment-17846286
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Daniel Martin commented on ARTEMIS-4301:
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Why aren't they generally recommended? Wouldn't this lead to a resource leak of 
all auto-created addresses and queues?

I understand the documentation is {_}technically correct{_}. However, it is 
still worth pointing out that there is a second level of defaults that will 
override the first in important practical scenarios.

By the way, why would the default value be {{true}} {_}anywhere{_}, if they are 
not recommended? I find that unsettling.

> Resource leakage / ignored configuration
> ----------------------------------------
>
>                 Key: ARTEMIS-4301
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-4301
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>    Affects Versions: 2.28.0
>            Reporter: Daniel Martin
>            Assignee: Justin Bertram
>            Priority: Critical
>
> I have an MQTT client connecting to the ActiveMQ Artemis broker. The client 
> connects with a {{sessionExpiryInterval}} of 60 seconds. Among my 
> {{<address-settings>}} in {{{}broker.xml{}}}, I have 
> {{{}<auto-delete-queues>true</auto-delete-queues>{}}}. When I restart the 
> MQTT client process, I can see in the broker's logs that the disconnect 
> message is received and, after 60 seconds, the "session state" is removed.
> However, every time I restart the client, the queue count in a few addresses 
> increases by one, and never decreases after that. Inspecting the queues, they 
> all have a message count of 0, and all but the one corresponding to the 
> currently-active client have a consumer count of 0. Furthermore, when 
> inspecting the queue's attributes, they are all marked as "Auto delete: 
> false", seemingly ignoring the setting in {{{}broker.xml{}}}.
> A secondary but still important issue: I had to manually turn queue 
> auto-deletion on, as it was explicitly disabled by default, contrary to what 
> is claimed in the documentation 
> ([https://activemq.apache.org/components/artemis/documentation/latest/address-settings.html]).



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