[Java broker] the activeConsumerCount for a queue can be incorrect for certain
types of subscriptions
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Key: QPID-3855
URL: https://issues.apache.org/jira/browse/QPID-3855
Project: Qpid
Issue Type: Bug
Components: Java Broker
Affects Versions: 0.14, 0.13, 0.12, 0.11, 0.10, 0.9, 0.8, 0.7, 0.6
Reporter: Robbie Gemmell
Assignee: Robbie Gemmell
Fix For: 0.15
activeConsumerCount on a queue is incorrect for certain types of subscriptions.
When registering a new subscription on the queue, the activeConsumerCount is
incremented. However, some subscriptions are not actually active when they are
registered, and only become so later. The queue is ntoifed of this state change
as it is a stateChangeListener for registered subscriptions, meaning the
activeConsumerCount is incremented again and as a result the count shown can be
innacurate. When registering a new subscription the count should only be
incremented if it is already active.
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