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From "James Furness (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-5898) Physical queues forwarded from many virtual destinations no longer supported
Date Wed, 22 Jul 2015 14:01:04 GMT
James Furness created AMQ-5898:
----------------------------------

             Summary: Physical queues forwarded from many virtual destinations no longer supported
                 Key: AMQ-5898
                 URL: https://issues.apache.org/jira/browse/AMQ-5898
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 5.11.1
            Reporter: James Furness


Hi Tim,

AMQ-5187 breaks some of our message routing where we use virtual queues to control mirroring/replication
of messages.

A simple example...

{code}
VIRTUAL.PUB.ALL
-> queue://SUBSCRIBER1
-> queue://SUBSCRIBER2

VIRTUAL.PUB.SUBSCRIBER1
-> queue://SUBSCRIBER1
{code}

...fails [this assert|https://github.com/apache/activemq/commit/f55edcfa25de1b55659a7113be60360c531ffa8a#diff-0def63df6ee6c0e4f8adcf00011b2f07R70]
because there are two composite destinations that route to {{queue://SUBSCRIBER1}}. With asserts
disabled messages are routed as expected.

We use layers of composite queues to achieve explicit routing of messages to either one consumer
or all consumers, and (also with static subscriptions) to target optimal routes across a mixture
of LAN and WAN links.

Fully appreciate that subscription recovery from virtual topics of a mapped queue is a beneficial
thing to do, however from our perspective it is also useful to retain the behaviour of being
able to have a many-to-one mapping between composite queues and physical queues. 

Could this validation relaxed, could it be made possible for the new behaviour to be disabled
or do you have any suggestions as to how else we could achieve our use case?

Thanks,
James



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