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From "Hiram Chirino (Commented) (JIRA)" <>
Subject [jira] [Commented] (APLO-86) Subscription with exclusive:true and auto-delete:true should not redeliver messages
Date Wed, 30 Nov 2011 04:29:41 GMT


Hiram Chirino commented on APLO-86:
----------------------------------- is a better fix for this issue.  The temp:true
feature is going to be removed.
> Subscription with exclusive:true and auto-delete:true should not redeliver messages
> -----------------------------------------------------------------------------------
>                 Key: APLO-86
>                 URL:
>             Project: ActiveMQ Apollo
>          Issue Type: Bug
>            Reporter: Lionel Cons
>            Assignee: Hiram Chirino
>             Fix For: 1.0
> The exclusive and auto-delete subscription options can be combined to create a private
reply queue.
> The current Apollo snapshot does not seem to always delete unconsumed messages, allowing
a rogue client to consume them.
> My test scenario:
>  - c1 subscribes to /queue/foo with exclusive:true and auto-delete:true and ack:client
>  - c1 sends messages with the appropriate reply-to header, expecting replies to go to
>  - (rogue) c2 subscribes to /queue/foo with the intent to steal messages, it does not
get any because of exclusive:true
>  - c1 receives and acks messages and then decides to quit
>  - there are not yet delivered or not yet acked messages in the queue
>  - c1 unsubscribes and disconnects
>  - the broker delivers the pending messages to c2 before/while deleting the queue
> IMHO, the broker should not deliver messages to c2 in this situation.
> The best solution is probably to forbid subscribing to a queue that has a subscription
with both exclusive:true and auto-delete:true.

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