This exception is occurring because you are queueing records at a much faster rate than they can be sent.
When you call the send method, the ProducerRecord will be stored in an internal buffer for sending to the broker. The method returns immediately once the ProducerRecord has been buffered, regardless of whether it has been sent.
Records are grouped into batches for sending to the broker, to reduce the transport overhead per message and increase throughput.
Once a record is added into a batch, there is a time limit for sending that batch to ensure that it has been sent within a specified duration. This is controlled by the Producer configuration parameter, request.timeout.ms, which defaults to 30 seconds. See related answer
If the batch has been queued longer than the timeout limit, the exception will be thrown. Records in that batch will be removed from the send queue.
Producer configs block.on.buffer.full, metadata.fetch.timeout.ms and timeout.ms have been removed. They were initially deprecated in Kafka 0.9.0.0.
Therefore give a try for increasing request.timeout.ms
Still, if you have any problem related to throughput, you can also refer following blog