drriguz commented on issue #15341:
URL: https://github.com/apache/pulsar/issues/15341#issuecomment-1139329495
I'm also confused about this, I found that messages are not redelivered in
my application by using the following code:
```java
try {
MetaDataChangedEvent<?> message =
messageDecoder.decodeEvent(msg.getData());
if (message instanceof AppDescriptionChanged) {
messageProcessService.processEvent((AppDescriptionChanged)
message);
} else {
messageProcessService.processEvent((SnapshotEvent<?>)
message);
}
consumer.acknowledge(msg);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
logger.error("Failed to process message {}: interrupted",
msg.getMessageId(), e);
consumer.negativeAcknowledge(msg);
} catch (Exception e) {
// todo: error handling & impl retry strategy
logger.error("Failed to process message {}", msg.getMessageId(),
e);
consumer.negativeAcknowledge(msg);
}
```
The document does not say clearly about that, and there's also someone
asking in Stackoverflow:
https://stackoverflow.com/questions/69590720/pulsar-if-a-message-gets-nackd-negativeacknowledge-when-will-it-be-redeliv
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