ngx_nonblocking_n  358 core/ngx_connection.c                                   ngx_nonblocking_n " %V failed",
ngx_nonblocking_n 2134 core/ngx_resolver.c                       ngx_nonblocking_n " failed");
ngx_nonblocking_n  160 event/ngx_event_accept.c                                   ngx_nonblocking_n " failed");
ngx_nonblocking_n   63 event/ngx_event_connect.c                       ngx_nonblocking_n " failed");
ngx_nonblocking_n  129 os/unix/ngx_process.c                           ngx_nonblocking_n " failed while spawning \"%s\"",
ngx_nonblocking_n  137 os/unix/ngx_process.c                           ngx_nonblocking_n " failed while spawning \"%s\"",