Mercurial > hg > nginx-quic
view src/os/win32/ngx_process_cycle.h @ 4010:74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
The following configuration causes nginx to hog cpu due to infinite loop
in ngx_http_upstream_get_peer():
upstream backend {
server 127.0.0.1:8080 down;
server 127.0.0.1:8080 down;
}
server {
...
location / {
proxy_pass http://backend;
}
}
Make sure we don't loop infinitely in ngx_http_upstream_get_peer() but stop
after resetting peer weights once.
Return 0 if we are stuck. This is guaranteed to work as peer 0 always exists,
and eventually ngx_http_upstream_get_round_robin_peer() will do the right
thing falling back to backup servers or returning NGX_BUSY.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 18 Aug 2011 16:52:38 +0000 |
| parents | f94e8ff65aa2 |
| children | d620f497c50f |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev */ #ifndef _NGX_PROCESS_CYCLE_H_INCLUDED_ #define _NGX_PROCESS_CYCLE_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_PROCESS_SINGLE 0 #define NGX_PROCESS_MASTER 1 #define NGX_PROCESS_SIGNALLER 2 #define NGX_PROCESS_WORKER 3 void ngx_master_process_cycle(ngx_cycle_t *cycle); void ngx_single_process_cycle(ngx_cycle_t *cycle); void ngx_close_handle(HANDLE h); extern ngx_uint_t ngx_process; extern ngx_pid_t ngx_pid; extern ngx_uint_t ngx_threaded; extern ngx_uint_t ngx_exiting; extern sig_atomic_t ngx_quit; extern sig_atomic_t ngx_terminate; extern sig_atomic_t ngx_reopen; extern ngx_uint_t ngx_inherited; extern ngx_pid_t ngx_new_binary; extern HANDLE ngx_master_process_event; extern char ngx_master_process_event_name[]; #endif /* _NGX_PROCESS_CYCLE_H_INCLUDED_ */