Question

Nginx (or php5) won't start

Posted June 6, 2014 4.6k views
Hi, Gave restart commands as follows; sudo service php5-fpm restart sudo service nginx restart Server is down immediately after. Any of you guys have an idea of why that happened and how to get going again? Many thanks
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5 answers
larry June 6, 2014
Logs are your friends. Check the nginx error log. That should give you some clue as to why it is crashing.
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david294611 June 6, 2014
Check the logs, also run top when you start the server to see the load.

Also check to see if you are under DDOS attack run

netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -n for port 80

netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -n for port 443

If you are being Dos attacked you need to setup a software firewall and ban the ip.

When you run those commands you'll get a list of IPs and a number beside them this number is the number of connections there opening to your web server.
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david294611 June 6, 2014
Sorry its

netstat -plan|grep :443|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -n for port 443(ssl)
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asb June 6, 2014
Like Larry mentioned, the first step to debugging any problem is to check for error messages in the log files. There are many reasons that Nginx might not restart cleanly, without more information there is very little we can do to help. To see the log messages, run: 


tail -n 20 /var/log/nginx/error.log
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vakUUm June 15, 2015

Error log - What can i do to fix this ?

2015/06/15 08:26:00 [emerg] 13778#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 09:16:19 [emerg] 1512#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 09:54:25 [emerg] 9153#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 09:55:10 [emerg] 9224#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 09:59:36 [emerg] 11857#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:02:46 [emerg] 1619#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:16:54 [emerg] 4071#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:23:10 [emerg] 4948#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:23:30 [emerg] 4968#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:25:23 [emerg] 5047#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:35:53 [emerg] 7863#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:39:17 [emerg] 8053#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38
2015/06/15 10:41:16 [emerg] 8319#0: the pool size must be a multiple of 16 in /etc/nginx/nginx.conf:38

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