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Posted to users@activemq.apache.org by Wael Al-Manasrah <wa...@uwaterloo.ca> on 2022/09/30 18:19:54 UTC
ActiveMQ Artemis maximum connection limit
Hello,
I am a graduate student @ University of Waterloo. I am conducting a comprehensive survey of open-source messaging middleware, I am trying to figure out what happens when a user max-connections resource limit is reached. Does Artemis refuse new connections with an error/exception? This link<https://github.com/apache/activemq-artemis/blob/e364961c8f035613f3ce4e3bdb3430a17efb0ffd/docs/user-manual/en/resource-limits.md> has all what I could find about resource limits in Artemis!
Thanks in advance and sorry for an inconvenience,
Wael.
Re: ActiveMQ Artemis maximum connection limit
Posted by Justin Bertram <jb...@apache.org>.
In the case of a client using the core protocol the
ActiveMQSessionCreationException would be directly returned when they tried
to create a new session beyond the configured limit. The exception would
have a message like this:
AMQ229110: Too many sessions for user 'myUser'. Sessions allowed: 1.
Hope that helps!
Justin
On Fri, Sep 30, 2022 at 1:38 PM Wael Al-Manasrah <
wael.al-manasrah@uwaterloo.ca> wrote:
> Thanks Justin,
>
> I am not interested in a specific protocol; however, if you can tell me
> what happens for the Core protocol it would be great. I just want to know
> if the client would be notified with some error/exception about why the new
> connection was refused!
>
> Thanks again,
>
> Wael.
> ________________________________
> From: Justin Bertram <jb...@apache.org>
> Sent: Friday, September 30, 2022 2:32 PM
> To: users@activemq.apache.org <us...@activemq.apache.org>
> Subject: Re: ActiveMQ Artemis maximum connection limit
>
> > Does Artemis refuse new connections with an error/exception?
>
> It depends on what you mean. The broker will refuse to allow the new
> connection, and it will throw an
> org.apache.activemq.artemis.api.core.ActiveMQSessionCreationException
> internally. However, how exactly that error is translated to the client
> will depend on the protocol that client is using and also how the client
> implementation deals with what is returned. ActiveMQ Artemis supports
> OpenWire, core, AMQP, STOMP, & MQTT. Are you concerned with a particular
> protocol and client implementation?
>
>
> Justin
>
> On Fri, Sep 30, 2022 at 1:22 PM Wael Al-Manasrah <
> wael.al-manasrah@uwaterloo.ca> wrote:
>
> > Hello,
> >
> > I am a graduate student @ University of Waterloo. I am conducting a
> > comprehensive survey of open-source messaging middleware, I am trying to
> > figure out what happens when a user max-connections resource limit is
> > reached. Does Artemis refuse new connections with an error/exception?
> This
> > link<
> >
> https://github.com/apache/activemq-artemis/blob/e364961c8f035613f3ce4e3bdb3430a17efb0ffd/docs/user-manual/en/resource-limits.md
> >
> > has all what I could find about resource limits in Artemis!
> >
> > Thanks in advance and sorry for an inconvenience,
> >
> > Wael.
> >
>
Re: ActiveMQ Artemis maximum connection limit
Posted by Wael Al-Manasrah <wa...@uwaterloo.ca>.
Thanks Justin,
I am not interested in a specific protocol; however, if you can tell me what happens for the Core protocol it would be great. I just want to know if the client would be notified with some error/exception about why the new connection was refused!
Thanks again,
Wael.
________________________________
From: Justin Bertram <jb...@apache.org>
Sent: Friday, September 30, 2022 2:32 PM
To: users@activemq.apache.org <us...@activemq.apache.org>
Subject: Re: ActiveMQ Artemis maximum connection limit
> Does Artemis refuse new connections with an error/exception?
It depends on what you mean. The broker will refuse to allow the new
connection, and it will throw an
org.apache.activemq.artemis.api.core.ActiveMQSessionCreationException
internally. However, how exactly that error is translated to the client
will depend on the protocol that client is using and also how the client
implementation deals with what is returned. ActiveMQ Artemis supports
OpenWire, core, AMQP, STOMP, & MQTT. Are you concerned with a particular
protocol and client implementation?
Justin
On Fri, Sep 30, 2022 at 1:22 PM Wael Al-Manasrah <
wael.al-manasrah@uwaterloo.ca> wrote:
> Hello,
>
> I am a graduate student @ University of Waterloo. I am conducting a
> comprehensive survey of open-source messaging middleware, I am trying to
> figure out what happens when a user max-connections resource limit is
> reached. Does Artemis refuse new connections with an error/exception? This
> link<
> https://github.com/apache/activemq-artemis/blob/e364961c8f035613f3ce4e3bdb3430a17efb0ffd/docs/user-manual/en/resource-limits.md>
> has all what I could find about resource limits in Artemis!
>
> Thanks in advance and sorry for an inconvenience,
>
> Wael.
>
Re: ActiveMQ Artemis maximum connection limit
Posted by Justin Bertram <jb...@apache.org>.
> Does Artemis refuse new connections with an error/exception?
It depends on what you mean. The broker will refuse to allow the new
connection, and it will throw an
org.apache.activemq.artemis.api.core.ActiveMQSessionCreationException
internally. However, how exactly that error is translated to the client
will depend on the protocol that client is using and also how the client
implementation deals with what is returned. ActiveMQ Artemis supports
OpenWire, core, AMQP, STOMP, & MQTT. Are you concerned with a particular
protocol and client implementation?
Justin
On Fri, Sep 30, 2022 at 1:22 PM Wael Al-Manasrah <
wael.al-manasrah@uwaterloo.ca> wrote:
> Hello,
>
> I am a graduate student @ University of Waterloo. I am conducting a
> comprehensive survey of open-source messaging middleware, I am trying to
> figure out what happens when a user max-connections resource limit is
> reached. Does Artemis refuse new connections with an error/exception? This
> link<
> https://github.com/apache/activemq-artemis/blob/e364961c8f035613f3ce4e3bdb3430a17efb0ffd/docs/user-manual/en/resource-limits.md>
> has all what I could find about resource limits in Artemis!
>
> Thanks in advance and sorry for an inconvenience,
>
> Wael.
>