udp reuseport when reload/restart

Gao,Yan(ACG VCP) gaoyan09 at baidu.com
Tue Sep 22 04:34:52 UTC 2020

How to handle udp/quic logical connection with reuseport when reload/restart. For tcp, old worker can only handle old established connection, and do not accept new connection ever.
It is possible with BPF? Although it is not good solution

PS, why do not add conn after accept when using epoll?

if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) {
    if (ngx_add_conn(c) == NGX_ERROR) {

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