Fix consumer redelivery should not clear availablePermits #170
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Motivation
For non-shared consumer:
redeliverUnacknowledgedMessages()
of consumer is clearing out theavailablePermits
which causes consumer to stop consuming messages from broker.Modifications
consumer should increase
availablePermits
with number of expired messages fromincomingMessages
queue and sends more permits to broker ifavailablePermits
reaches to defined threshold.Result
Consumer will not stuck while receiving messages due to
redeliverUnacknowledgedMessages()
.