Hi! I just wanted to add my 2 cents here….
- We are facing a very similar issue. During reloads of reuseport enabled configuration it sometimes happens that no workers accept new connections, bandwidth basically drops to 0 and it all reverts back to normal within few seconds. Hurts but not deadly. - Our nginx uses the Intel QAT card which allows only a limited number of user-space processes using the card at any given moment. Therefore, our HUP handler has been patched quite a bit to shutdown workers one-by-one and then use the ngx_reap_child to start a new worker with updated configuration. - We only use the reuseport option in combination with the QAT-based servers (servers with the patched HUP behaviour). Therefore, I am not yet sure if changes in the reload mechanism are the cause of the issue - still investigating. - Thanks a lot for the “ss -nltp” tip. - Currently testing the “iptables-drop-empty-ACKs” workaround. - No two nginx masters are running simultaneously. - Reducing the number of workers is also not happening, due to the changes described above - the new value of worker_processes will simply be ignored. Thanks, Tomas _______________________________________________ nginx-devel mailing list nginx-devel@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx-devel
