[Icecast-dev] Too many open files

[Chen Wei Hsu]

Hi all,

I am trying to stream for over 1k users on Ubuntu 16.04. I notice that when
stream connection is over 1024, it get warning like this:

WARN connection/_accept_connection accept() failed with error 24: Too many
open files

Tried these configs and reboot, it won't work!
/etc/pam.d/common-session
session required pam_limits.so

/etc/sysctl.conf
fs.file-max = 100000

/etc/icecast2/icecast.xml
<clients>20000</clients>

# open file limit
/etc/security/limits.conf
icecast2 hard nofile 90000
icecast2 soft nofile 50000
icecast2 hard nproc 90000
icecast2 soft nproc 50000

How do I know?
ps aux | grep icecast2
cat /proc/ICECAST2_PID/limits
max open file is still 1024

In the end, I have to add the following line to /etc/init.d/icecast2

ulimit -n 20000

And I can stream over 1k users now. There is no config about ulimit for
icecast2, and therefore, I suggest that we add something like this in
/etc/init.d/icecast2

# Check if the ULIMIT is set in /etc/default/icecast2
if [ -n "$ULIMIT" ]; then
        # Set the ulimits
        ulimit $ULIMIT
fi

And add a /etc/default/icecast2 with the following sample config

#  Example: ULIMIT="-n 4096"
#ULIMIT="-n 4096"

I steal these from Nginx config! Anyway, what I am saying is that we need a
config file to deal with this issue!
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