Make auto-forwarding serialized and parallel #189
Merged
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In the case of auto_forwarding_= true, an error of "socket is already in use, race happened on connection to " appears for the append_entries of the follower #184
Added a new parameter
auto_forwarding_max_connections_
, andauto-forwarding can be parallelized up to this number.
Raft server is actively managing the RPC client so as to avoid
the race on the same connection.
TODO: handling RPC timeout of auto-forwarding.