jiazhai commented on issue #2574: Timeout message not get redeliver in TopicsConsumer when use message listener URL: https://github.com/apache/incubator-pulsar/issues/2574#issuecomment-421381833 The main reason for this error is that the message listener for TopicsConsumer was also set for individual sub-consumerImpl. In above calling stack, when time-out, TopicsConsumer.UnAckedMessageTracker will let sub-consumerImpl to redeliver messages.
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