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As stated in the title, my Nginx server seems to be crashing constantly although the reason is unknown.

I do have some hints from my error log which may lead to the issue.

I have tried to increase the open file limit, which has some affect, but to no serious avail.

2015/09/29 17:18:01 [crit] 20560#0: accept4() failed (24: Too many open files)
2015/09/29 17:18:01 [crit] 20560#0: accept4() failed (24: Too many open files)

I have tried to increase the limit, but I see this in my error log also

2015/09/29 17:18:02 [alert] 20632#0: setrlimit(RLIMIT_NOFILE, 300000000) failed (1: Operation not permitted)
2015/09/29 17:18:02 [alert] 20633#0: setrlimit(RLIMIT_NOFILE, 300000000) failed (1: Operation not permitted)
2015/09/29 17:18:02 [alert] 20560#0: recvmsg() truncated data

How do I give permission to increase the file limit?

Also, is this even the reason my server is crashing?

Thank you!

Just checked some more data, I have edited my files, but for some reason when checking the hard limit it says 4096? 

root@nalsec:~# sysctl -p
net.ipv4.ip_forward = 1
net.ipv6.conf.all.autoconf = 0
net.ipv6.conf.default.autoconf = 0
net.ipv6.conf.eth0.autoconf = 0
net.ipv6.conf.all.accept_ra = 0
net.ipv6.conf.default.accept_ra = 0
net.ipv6.conf.eth0.accept_ra = 0
fs.file-max = 2500000000000000000
root@nalsec:~# ulimit -Hn
4096

Which contrasts with my fs.file-max

I tried this, and it says I don't have permission (I am root)

root@nalsec:~# ulimit -Hn 1000000000
-bash: ulimit: open files: cannot modify limit: Operation not permitted

I have edited this file already to no avail nano /etc/security/limits.conf

#@faculty        hard    nproc           50
#ftp             hard    nproc           0
#ftp             -       chroot          /ftp
#@student        -       maxlogins       4

# End of file
nginx       soft    nofile  10240000000000000000000
nginx       hard    nofile  10240000000000000000000
*         hard    nofile      10240000000000000000000000
*         soft    nofile      10240000000000000000000000
root      hard    nofile      10240000000000000000000000
root      soft    nofile      10240000000000000000000000
www-data soft nofile 1024000000000000000
www-data hard nofile 1024000000000000000
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1 Answer 1

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3

fs.file-max is a system-wide limit on the total number of file descriptors that can be open on the system. It has no impact on the per-process limit.

To increase the file descriptor limit for individual processes, it's easiest to do it via limits.conf:

# cat /etc/security/limits.d/nofile.conf
* soft nofile 10000
* hard nofile 1000000

That'll give all processes 10,000 file descriptors by default, with the ability to request an upgrade to 1,000,000 (via setrlimit) if they want.

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  • Hello, thank you for the response I am currently getting this
    – Nick
    Sep 29, 2015 at 22:07
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    cat /etc/security/limits.d/nofile.conf cat: /etc/security/limits.d/nofile.conf: No such file or directory
    – Nick
    Sep 29, 2015 at 22:07
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    I was showing you what to put into that file -- you'll need to create it and put the contents I showed.
    – womble ♦
    Sep 29, 2015 at 22:08
  • I have already edited a file with a different name with similar contents nano /etc/security/limits.conf Should I still create the new file?
    – Nick
    Sep 29, 2015 at 22:10
  • Ok I have added the new file anyway with the following contents # cat /etc/security/limits.d/nofile.conf * soft nofile 100000000000000000 * hard nofile 100000000000000000000000
    – Nick
    Sep 29, 2015 at 22:11

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