aloyszhang edited a comment on pull request #9743:
URL: https://github.com/apache/pulsar/pull/9743#issuecomment-786789928
@eolivelli
Actually, the default generated deadLetterTopic are not consistent from
ConsumerImpl
```java
.deadLetterTopic(String.format("%s-%s" +
RetryMessageUtil.DLQ_GROUP_TOPIC_SUFFIX, topic, subscription))
```
and ConsumerBuilderImpl
```java
String retryLetterTopic = topicFirst.getNamespace() + "/" +
conf.getSubscriptionName() + RetryMessageUtil.RETRY_GROUP_TOPIC_SUFFIX;
```
So, IMO, it's better to unite the format of default retryLetterTopic and
deadLetterTopic and fix the potential risk for consumer to receive extra
message from topics it does not subscribe although we have to adjustment out
application.
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