Why use only one thread pool in MINA-1.0 instead of 2 thread pools (IO and Protocol) in MINA-0.8?

[Hieu Phan Thanh]

Hi all, 
I'm wondering about the reason why MINA team merged into only one thread
pool instead of 2 thread pools (IO and Protocol) in mina-0.8.
Is there any advantage point or something? 
Please share your knowledge.

Thanks & best regards,
Hieu Phan.