TCP Reuse Address
Introduction
The SO_REUSEADDR flag (or socket option) tells the kernel to reuse a local socket in
TIME_WAIT state, without waiting for its natural timeout to expire.
When multiple processes with differing UIDs assign sockets to an identical UDP socket address with SO_REUSEADDR,
incoming packets can become randomly distributed among the sockets.
Thus, DONOT use SO_REUSEADDR on UDP.