In "Brewer’s Conjecture and the Feasibility of Consistent, Available, Partition-Tolerant Web Services", it says
For a distributed system to be continuously available, every request received
by a non-failing node in the system must result in a response
So in a system such as a zookeeper cluster or MongoDB replica set, in which the only master can accept write request, if clients send a write request to a slave, it will redirect clients to master or reject the request.
In this case, it that true that request received by slave results in a response?
And why zookeeper is always called the CP system without A?
I have read How to understand the "Availability" of the CAP theorem?, but did not get the answer.