codelipenghui commented on code in PR #15709:
URL: https://github.com/apache/pulsar/pull/15709#discussion_r981145806
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site2/docs/concepts-messaging.md:
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@@ -633,10 +641,14 @@ producer = client.create_producer(topic='my-topic',
batching_type=pulsar.Batchin
</Tabs>
````
-> **Limitations of Key_Shared type**
-> When you use Key_Shared type, be aware that:
-> * You need to specify a key or orderingKey for messages.
-> * You cannot use cumulative acknowledgment with Key_Shared type.
+:::caution
+**Limitations of Key_Shared type**
+
+When you use Key_Shared type, be aware that:
+ * You need to specify a key or orderingKey for messages.
+ * You cannot use cumulative acknowledgment with Key_Shared type.
+ * When the position of the newest message in a topic is `X`, a key-shared
consumer that is newly attached to the same subscription and connected to the
topic will **not** receive any messages until the position of the oldest
unacknowledged message in this subscription is newer than or equal to `X`.
Review Comment:
```suggestion
* When the position of the newest message in a topic is `X`, a key-shared
consumer that is newly attached to the same subscription and connected to the
topic will **not** receive any messages until all the messages before `X` have
been acknowledged.
```
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