Topics Delivering Duplicate Messages when have cyclic network of brokers
w/multicast discovery
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Key: AMQ-2030
URL: https://issues.apache.org/activemq/browse/AMQ-2030
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.2.0
Reporter: Gary Tully
Assignee: Gary Tully
Fix For: 5.3.0
In a cyclic network using m/cast discovery. Every broker knows about ever other
broker.
Network of 3, broker1, broker2, broker2 - consumer on broker2, producer on
broker1
problem description:
consumer on broker 2 is propagated to broker1 and broker3.
Resulting bridged consumer on 1 is propagated to 2 and 3:
- broker 2 ignores it because of the broker path match.
- broker 3 bridges it and propagates the resulting consumer to 2 and 1. 2
again ignores as does 1 because of broker path info..
Resulting bridged consumer on 3 is now a duplicate of the subscription
propagated to 3 via broker 1. This cannot be suppressed using broker path
because 3 only sees the brokerpath to broker1.
What is needed is a history of the original consumerId in the bridged
subscripton such that subsequent subscriptions can be seen as duplicates.
ConsumerInfo needs to contain a list of networkConsumerIds.
To have this propagated needs a wireFormat version increment.
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