[GitHub] [pulsar] sijie opened a new issue #4643: Per message sequence id is lost in message batch

[GitBox <gi...@apache.org>]

sijie opened a new issue #4643: Per message sequence id is lost in message batch
URL: https://github.com/apache/pulsar/issues/4643
 
 
   **Describe the bug**
   
   Produce 10 messages using following code:
   
   ```
                   for (int i = 1; i <= numMessages; i++) {
                       producer.newMessage()
                           .value("value-" + i)
                           .sequenceId(i)
                           .sendAsync();
                   }
                   producer.flush();
   ```
   
   The 10 messages will return the same sequence id `1`. Because currently we only store the sequence id for the first message in the message batch.
   
   **To Reproduce**
   
   Run the code example
   
   **Expected behavior**
   
   User might be using offset as sequence id when copying a file into pulsar topic. The sequence id will be dropped by Pulsar and the consumers can't retrieve the sequence id that the producer set.
   
   **Additional context**
   
   N/A

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