what mean "Since it is the consumers instead of the broker who dispatch the messages from the batches"?

[startjava]

https://pulsar.apache.org/docs/next/concepts-messaging/#batching-for-key-shared-subscriptions

Since it is the consumers instead of the broker who dispatch the messages from the batches, the key of the first message in one batch is considered as the key to all messages in this batch, thereby leading to context errors

mean "consumers dispatch message to other consumer"??

[startjava]

@momo-jun
https://forum.streamnative.io/t/topic/592
two same question，N day, no answer .thank you

[momo-jun]

Sorry for the late response. From the context (for batched messages), your understanding seems correct. I'd like to ping engineers to confirm this point.
@shibd Can you please help confirm the logic here?

[shibd]

mean "consumers dispatch message to other consumer"??

No, The consumers here refer to the objects used inside the broker to dispatch messages.

the key of the first message in one batch is considered as the key to all messages in this batch, thereby leading to context errors

You can read this passage. In batchMsg, the broker will only extract the key of the first message to select the consumer. Therefore, when the message's key in the batch is inconsistent, the consumer may receive the inconsistent key message.