No Broker Available Error when configs 3 broker nodes on codes.

[dung3197]

It's a beautiful day as other days when I use multiprocessing to get data from a topic that has only one partition.
I divided the offsets range by 500 proccesses to process.

Everything seems okay when I get message from one broker nodes, but when I declare 3 nodes in codes like bellow:

consumer_init = KafkaConsumer(
auto_offset_reset='earliest',
group_id='Client3',
bootstrap_servers='*01..com.vn:9092, *02..com.vn:9092, *03..com.vn:9092', #This not works
#bootstrap_servers='*01..com.vn:9092', #This works
value_deserializer=lambda x: x.decode('utf-8')
)

I'm not be able to pull all of the messages. At a random time, the Consumer return "No Broker Available" Error.
When limit down to 200 processes and declare 3 nodes on consumer to get data, there's no more "No Broker Available" output.

I believe it is the issue that match with #2281
@dpkp please have a look