About kafka-logger param： batch_max_size

[yangshike]

Description

After this parameter is set, the messages sent to Kafka look like this： [{"a":1,"b":2},{"a":3,"b":4}] This caused a problem, some clients could not parse this format ！ Some tools first save the message buffers and submit them in batches, but do not merge them together. The message from kafka is as follows： {"a":1,"b":2},{"a":3,"b":4}