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Posted to users@activemq.apache.org by Michael Justin <mi...@gmx.net> on 2016/03/13 08:26:59 UTC

ActiveMQ 5.13.0 warning on unsubscribing durable subscriber

The client connects and specified a client id:

     CONNECT
     client-id:test2

and subscribes with a subscription name

     SUBSCRIBE
     destination:/topic/TestUnsubscribeDurable
     ack:auto
     id:...
     activemq.subscriptionName:testsub



But when the client sends the two unsubscribe frames as explained in 
http://stackoverflow.com/questions/30519152/how-to-unsubscribe-from-durable-topic-subscription, 


     UNSUBSCRIBE
     destination:/topic/TestUnsubscribeDurable

     UNSUBSCRIBE
     destination:/topic/TestUnsubscribeDurable
     activemq.subscriptionName:testsub

the ActiveMQ broker logs a warning:

       WARN | Exception occurred processing: null:
      javax.jms.InvalidDestinationException: No durable subscription exists
      for clientID: testsub and subscriptionName: testsub

The warning is a bit confusing because the clientID used when connecting 
was test2, not testsub.

Unsubscribing only seems to work when client-id equals subscriptionName 
(the admin interface then no longer shows the subscription).

ActiveMQ 5.7 removed the restriction that client-id and subscriptionName 
have to be the same. Can it be that this change was not applied to the 
unsubscribe logic?


Also posted on Stackoverflow at http://stackoverflow.com/questions/35936950/

Re: ActiveMQ 5.13.0 warning on unsubscribing durable subscriber

Posted by Timothy Bish <ta...@gmail.com>.

The feature of not matching the client ID and the subscription name only 
works for the newer STOMP v1.1+ style subscriptions where the 'id' value 
is included.  In your example you would need to match the client ID to 
the subscription name.

Refer to this test using v1.1:

https://github.com/apache/activemq/blob/master/activemq-stomp/src/test/java/org/apache/activemq/transport/stomp/Stomp11Test.java#L933

On 03/13/2016 03:26 AM, Michael Justin wrote:
>
> The client connects and specified a client id:
>
>     CONNECT
>     client-id:test2
>
> and subscribes with a subscription name
>
>     SUBSCRIBE
>     destination:/topic/TestUnsubscribeDurable
>     ack:auto
>     id:...
>     activemq.subscriptionName:testsub
>
>
>
> But when the client sends the two unsubscribe frames as explained in 
> http://stackoverflow.com/questions/30519152/how-to-unsubscribe-from-durable-topic-subscription, 
>
>
>     UNSUBSCRIBE
>     destination:/topic/TestUnsubscribeDurable
>
>     UNSUBSCRIBE
>     destination:/topic/TestUnsubscribeDurable
>     activemq.subscriptionName:testsub
>
> the ActiveMQ broker logs a warning:
>
>       WARN | Exception occurred processing: null:
>      javax.jms.InvalidDestinationException: No durable subscription 
> exists
>      for clientID: testsub and subscriptionName: testsub
>
> The warning is a bit confusing because the clientID used when 
> connecting was test2, not testsub.
>
> Unsubscribing only seems to work when client-id equals 
> subscriptionName (the admin interface then no longer shows the 
> subscription).
>
> ActiveMQ 5.7 removed the restriction that client-id and 
> subscriptionName have to be the same. Can it be that this change was 
> not applied to the unsubscribe logic?
>
>
> Also posted on Stackoverflow at 
> http://stackoverflow.com/questions/35936950/
>
>


-- 
Tim Bish
twitter: @tabish121
blog: http://timbish.blogspot.com/