Resolved [alert] 32414#0: socket() failed (24: Too many open files) while connecting to upstream

[Pinocchio]

Hi,

Today, my website reached 4.000 concurrent users and i got lots of errors like:

[alert] 32414#0: .... socket() failed (24: Too many open files) while connecting to upstream.

How do I fix this?

 

[IgorG]

Increase maximum number of open files:

# ulimit -n 8192

To increase these limits permanently:

1. Add the following lines in /etc/security/limits.conf file before # End of file line:
   # tail -n4 /etc/security/limits.conf
   * soft nofile 8192
   * hard nofile 8192
   
   # End of file
   
   
2. Reboot the server to apply these changes.

 

[Pinocchio]

Thanks, I added those lines and saved the file. Shall I reboot using the following command?

# service sw-engine restart && service sw-cp-server restart

 

[IgorG]

Reboot means server reboot:

# reboot

 

[Pinocchio]

Ok, thanks again.

 

[SLOposum]

Ok, thanks again.

Having same problems. Running a multisite and when one of the sites publishes an articles, many of these errors appear.
Did you solve this @Pinocchio?

 

[dj ramc]

same here and @IgorG solution doesnt helped

 

[dj ramc]

I edited the nginx.conf file.

etc/systemd/system/nginx.service

[Service]
LimitNOFILE=16384

and

/etc/nginx/nginx.conf

worker_processes auto; #1

events {
worker_connections 4096; #1024
}

We'll see if it helps.