THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
We shall reuse the same FENCED_LEADER_EPCOH error code to indicate that there is a larger leader epoch. Depending on whether the sender is shutting down or not, it would either ignore the response error or become a follower of the leader indicated in the response.
...
Fetch
...
The fetch request is sent by both voters and observers to the current leader in order to replicate log changes. For voters this also serves as a liveness check of the leader.
...