eolivelli commented on code in PR #17161:
URL: https://github.com/apache/pulsar/pull/17161#discussion_r953699041
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pulsar-broker/src/test/java/org/apache/pulsar/client/api/DispatcherBlockConsumerTest.java:
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@@ -998,6 +999,11 @@ public void
testBrokerDispatchBlockAndSubAckBackRequiredMsgs() {
* maxUnAckPerDispatcher limit
**/
consumer1Sub2 = (ConsumerImpl<byte[]>)
pulsarClient.newConsumer().topic(topicName)
+ // in the scope of this test is important to not group
acks because
+ // the ack for messages happens after receiving a new
message from the topic.
+ // If the acks are sent in batch it may happen that the
dispatcher is still blocked until
+ // it receives the batched acks and the Consumer#receive
will return null.
+ .acknowledgmentGroupTime(0, TimeUnit.SECONDS)
Review Comment:
Using ackReceiptEnable can help as well.
Because you cam wait for the server to process the ack
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