what response does broker send when there is not message on the partition

[Ganesh Nikam]

Hi All,

I have the kafka client which is fetching data from particular 
partition. On the broker there are there are some messages (say 100) on 
this partition and producers has stop producing the messages.
Now my consumer consumers these 100 messages and the next fetch offset 
is set to 101.  when I send the fetch request with 101 offset, I did 
receive some response from broker, but I don't know what it is.
I am not able to parse it. Can you please tell me what response does 
broker sends, when there is no message on that partition ?

I want to block my consumers till there is no message on the broker. How 
can I do that ?

- Ganesh