[fix][txn] fix the consumer stuck due to deduplicated messages in pending ack state - #21177
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Motivation
#19581 filter messages in dispatcher. However, it filters out duplicate messages after calculating
totalMessages, which results in occupying permits even though the messages were not sent to the consumer. This could potentially cause the consumer to be stuck and unable to consume.Modifications
Calculate totalMessages after filtering out the messages.
Verifying this change
Make sure that the change passes the CI checks.
Added test in
org.apache.pulsar.client.impl.TransactionEndToEndTest#testMsgsInPendingAckStateWouldNotGetTheConsumerStuckDocumentation
docdoc-requireddoc-not-neededdoc-completeMatching PR in forked repository
PR in forked repository: hrzzzz#2