Child Processes are shutting down unexpectedly
Curtis Spencer
thorin at gmail.com
Fri Mar 30 05:38:58 MSD 2007
Hi,
My apologies if this message was received more than once.
My nginx seems to hang after a few minutes of no requests. I am
using it to proxy to a single mongrel process in development.
I am getting the following in my error_log when I am using debug output.
2007/03/29 13:18:17 [notice] 30348#0: using the "epoll" event method
2007/03/29 13:18:17 [notice] 30348#0: nginx/0.5.15
2007/03/29 13:18:17 [notice] 30348#0: OS: Linux 2.6.20-gentoo-r3
2007/03/29 13:18:17 [notice] 30348#0: sysctl(KERN_RTSIGMAX): 0
2007/03/29 13:18:17 [notice] 30348#0: getrlimit(RLIMIT_NOFILE):
1024:1024
2007/03/29 13:18:17 [notice] 30348#0: start worker processes
2007/03/29 13:18:17 [notice] 30348#0: start worker process 30353
2007/03/29 13:18:17 [notice] 30348#0: start worker process 30354
2007/03/29 13:24:29 [notice] 30354#0: signal 28 (SIGWINCH) received,
shutting down
2007/03/29 13:24:29 [info] 30354#0: epoll_wait() failed (4:
Interrupted system call)
2007/03/29 13:24:29 [notice] 30354#0: gracefully shutting down
2007/03/29 13:24:29 [notice] 30354#0: exiting
2007/03/29 13:24:29 [notice] 30353#0: signal 28 (SIGWINCH) received,
shutting down
2007/03/29 13:24:29 [info] 30353#0: epoll_wait() failed (4:
Interrupted system call)
2007/03/29 13:24:29 [notice] 30353#0: gracefully shutting down
2007/03/29 13:24:29 [notice] 30353#0: exiting
2007/03/29 13:24:29 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:24:29 [notice] 30348#0: signal 17 (SIGCHLD) received
2007/03/29 13:24:29 [notice] 30348#0: worker process 30353 exited
with code 0
2007/03/29 13:24:29 [notice] 30348#0: worker process 30354 exited
with code 0
2007/03/29 13:24:29 [notice] 30348#0: start worker process 3236
2007/03/29 13:24:29 [notice] 30348#0: start worker process 3237
2007/03/29 13:24:29 [notice] 30348#0: signal 29 (SIGIO) received
2007/03/29 13:24:29 [notice] 3236#0: gracefully shutting down
2007/03/29 13:24:29 [notice] 3236#0: exiting
2007/03/29 13:24:29 [notice] 30348#0: signal 17 (SIGCHLD) received
2007/03/29 13:24:29 [notice] 30348#0: worker process 3236 exited with
code 0
2007/03/29 13:24:29 [notice] 30348#0: signal 29 (SIGIO) received
2007/03/29 13:24:29 [notice] 3237#0: gracefully shutting down
2007/03/29 13:24:29 [notice] 3237#0: exiting
2007/03/29 13:24:29 [notice] 30348#0: signal 17 (SIGCHLD) received
2007/03/29 13:24:29 [notice] 30348#0: worker process 3237 exited with
code 0
2007/03/29 13:24:32 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:24:36 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:24:40 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:24:42 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:24:45 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:25:09 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:25:52 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:25:53 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:26:21 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:27:08 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:27:09 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:27:14 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:27:23 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:27:31 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:28:14 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:28:15 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:28:30 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:30 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:32 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:33 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:34 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:36 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:38 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
2007/03/29 13:29:39 [notice] 30348#0: signal 28 (SIGWINCH) received,
stop accepting connections
Any ideas. Let me know what additional information would be useful.
I have attached my config (It is based on Ezra's mongrel config that
he has published elsewhere.)
# user and group to run as
user me users;
daemon off;
# number of nginx workers
worker_processes 2;
error_log /current/log/nginx_core_error.log debug;
# pid of nginx master process
pid /current/log/nginx.pid;
# Number of worker connections. 1024 is a good default
events {
worker_connections 1024;
}
# start the http module where we config http access.
http {
# pull in mime-types. You can break out your config
# into as many include's as you want to make it cleaner
include /etc/nginx/mime.types;
# set a default type for the rare situation that
# nothing matches from the mimie-type include
default_type application/octet-stream;
# configure log format
log_format main '$remote_addr - $remote_user [$time_local] $status '
'"$request" $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
# main access log
access_log /current/log/nginx_access.log main;
# main error log
error_log /current/log/nginx_error.log debug;
# no sendfile on OSX
sendfile on;
# These are good default values.
tcp_nopush on;
tcp_nodelay off;
# output compression saves bandwidth
gzip on;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_proxied any;
gzip_types text/plain text/html text/css application/x-
javascript text/xml application/xml
application/xml+rss text/javascript;
# this is where you define your mongrel clusters.
# you need one of these blocks for each cluster
# and each one needs its own name to refer to it later.
upstream mongrel {
server 127.0.0.1:3000;
}
upstream merb {
server 127.0.0.1:4000;
}
# the server directive is nginx's virtual host directive.
server {
# port to listen on. Can also be set to an IP:PORT
listen 80;
auth_basic "Restricted";
auth_basic_user_file /current/config/nginx_passwd;
# Set the max size for file uploads to 50Mb
client_max_body_size 100M;
# sets the domain[s] that this vhost server requests for
# server_name www.[engineyard].com [engineyard].com;
#server_name alpha.contraspot.com;
# doc root
root /current/public;
# vhost specific access log
access_log /current/log/nginx.vhost.access.log main;
# this rewrites all the requests to the maintenance.html
# page if it exists in the doc root. This is for capistrano's
# disable web task
if (-f $document_root/system/maintenance.html) {
rewrite ^(.*)$ /system/maintenance.html last;
break;
}
location /upload {
# needed to forward user's IP address to rails
proxy_set_header X-Real-IP $remote_addr;
# needed for HTTPS
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect false;
proxy_max_temp_file_size 0;
proxy_pass http://merb;
break;
}
location / {
# needed to forward user's IP address to rails
proxy_set_header X-Real-IP $remote_addr;
# needed for HTTPS
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect false;
proxy_max_temp_file_size 0;
# If the file exists as a static file serve it directly without
# running all the other rewite tests on it
if (-f $request_filename) {
break;
}
# check for index.html for directory index
# if its there on the filesystem then rewite
# the url to add /index.html to the end of it
# and then break to send it to the next config rules.
if (-f $request_filename/index.html) {
rewrite (.*) $1/index.html break;
}
# this is the meat of the rails page caching config
# it adds .html to the end of the url and then checks
# the filesystem for that file. If it exists, then we
# rewite the url to have explicit .html on the end
# and then send it on its way to the next config rule.
# if there is no file on the fs then it sets all the
# necessary headers and proxies to our upstream mongrels
if (-f $request_filename.html) {
rewrite (.*) $1.html break;
}
if (!-f $request_filename) {
proxy_pass http://mongrel;
break;
}
}
error_page 500 502 503 504 /500.html;
error_page 413 /413.html;
location = /500.html {
root /current/public;
}
}
}
Thanks again for all the hard work on this software.
-Curtis
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