Can not create changefeed with KOP downstrems

[Rustin170506]

What did you do?

Create a changefeed with a KOP downstream.

What did you expect to see?

Create changefeed success.

What did you see instead?

[root@vm ~]# tiup ctl:v6.5.2 cdc changefeed create     --server=http://10.xxx:8x300/     --sink-uri="kafka://[127.0.0.1:9092/test-pulsar?protocol=canal-json&max-message-bytes=67108864&kafka-version=2.4.0&replication-factor=1](http://127.0.0.1:9092/test-pulsar?protocol=canal-json&max-message-bytes=67108864&kafka-version=2.4.0&replication-factor=1)"     --changefeed-id="simple-replication-task"
Starting component `ctl`: /root/.tiup/components/ctl/v6.5.2/ctl cdc changefeed create --server=http://10xxx8:8300/ --sink-uri=kafka://[127.0.0.1:9092/test-pulsar?protocol=canal-json&max-message-bytes=67108864&kafka-version=2.4.0&replication-factor=1](http://127.0.0.1:9092/test-pulsar?protocol=canal-json&max-message-bytes=67108864&kafka-version=2.4.0&replication-factor=1) --changefeed-id=simple-replication-task
Error: [CDC:ErrKafkaNewSaramaProducer]new sarama producer: [CDC:ErrKafkaBrokerConfigNotFound]cannot find the `message.max.bytes` from the broker's configuration
Error: exit status 1
[root@vm10-2-103-148 ~]# client_loop: send disconnect: Broken pipe

Versions of the cluster

master

[Rustin170506]

See more at https://pingcap.feishu.cn/docx/V6led4ovEoC40IxWM07cTllMnkg