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https://issues.apache.org/jira/browse/JAMES-2739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16938276#comment-16938276
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Benoit Tellier commented on JAMES-2739:
---------------------------------------

Hi [~marin_cenusa]

JMX is a low level protocol that actually make quite strong assertions on the 
underlying JAVA beans. Here I bet you are trying to pass a long as an argument 
of what had been refactored into an Optional<Duration>.

It turns out JMX usage for 'management purposes' like the mailQueue in 
completly untested. In the last year, the community developed alternatives to 
the JMX protcol for mailQueue management. See [1] [2].

For your information the community is trying to get rid of JMX for the newest 
Guice products.

As such I doubt the community can provide much help on this topic.

Of course contributions and fixes for this issue are welcome.

[1] WebAdmin MailQueue routes: 
http://james.apache.org/server/manage-webadmin.html#Administrating_mail_queues

[2] Grafana metrics: http://james.apache.org/server/metrics.html

> Can not browse message queue via jmx connection
> -----------------------------------------------
>
>                 Key: JAMES-2739
>                 URL: https://issues.apache.org/jira/browse/JAMES-2739
>             Project: James Server
>          Issue Type: Bug
>          Components: JMX
>            Reporter: Hans müller
>            Priority: Major
>         Attachments: image-2019-04-19-16-58-30-066.png, 
> image-2019-04-19-16-59-46-136.png
>
>
>  Connect to james via jmx client, e.g. jconsole
>  !image-2019-04-19-16-59-46-136.png! 
> browse the outgoing queue (if it has content).
> it shows something like 
> !image-2019-04-19-16-58-30-066.png!
> Same with other clients



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