codelipenghui commented on a change in pull request #9102:
URL: https://github.com/apache/pulsar/pull/9102#discussion_r550955691
##########
File path:
pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerImpl.java
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@@ -1843,18 +1812,29 @@ private boolean processPossibleToDLQ(MessageIdImpl
messageId) {
}
}
if (deadLetterProducer != null) {
- try {
- for (MessageImpl<T> message : deadLetterMessages) {
- deadLetterProducer.newMessage()
- .value(message.getValue())
- .properties(message.getProperties())
- .send();
- }
- acknowledge(messageId);
- return true;
- } catch (Exception e) {
- log.error("Send to dead letter topic exception with topic:
{}, messageId: {}", deadLetterProducer.getTopic(), messageId, e);
+ for (MessageImpl<T> message : deadLetterMessages) {
+ deadLetterProducer.newMessage()
+ .value(message.getValue())
+ .properties(message.getProperties())
+ .sendAsync()
+ .whenComplete((msgId, ex) -> {
+ if (ex != null) {
+ log.error("Send to dead letter topic
exception with topic: {}, messageId: {}",
+ deadLetterProducer.getTopic(),
messageId, ex);
+ return;
+ }
+
+ log.debug("Redeliver dead letter message
topic: {}, messageId: {} to dead letter topic with topic: {}, messageId: {}",
+ message.getTopicName(), messageId,
deadLetterProducer.getTopic(), msgId);
+ try {
+ acknowledge(messageId);
+ } catch (Exception e) {
+ log.error("Acknowledge dead letter message
exception with topic: {}, messageId: {}",
+ message.getTopicName(), messageId);
+ }
+ });
}
+ return true;
Review comment:
It's not a safe operation since the client might crash before the next
retry.
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