RoundRobinDispatchPolicy divides uneven
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Key: AMQ-1006
URL: https://issues.apache.org/activemq/browse/AMQ-1006
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 4.0.2
Reporter: Holger Bruch
Priority: Minor
Attachments: RoundRobinDispatchPolicyDivide.patch
In case that multiple consumers with different message selectors are registered
for the same destination, messages are not evenly divided.
To reproduce, register 2 consumers for prio 9, one for prio 4. Of 1000 messages
with prio 9 both prio 9 consumers should receive 500. Actually, the first
consumer gets 667 messages, the second 333.
This is caused by the consumer shifting strategy in the
RoundRobinDispatchPolicy which rotates consumers, even if they did not match.
The attached file contains a testcase illustrating the behavior and a patch for
RoundRobinDispatchPolicy, that shifts the first matching consumer instead of
the first.
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