Maximum file limit reach error is occur while we are starting the Apache server at that time you can fix the issue by using root login details.
root@gunjan[~]#pico /etc/sysctl.conf
Add following line as
fs.file-max = 22992
Save and exit from the file.
You need to run following command from shell to active changes.
root@gunjan[~]#sysctl -p
It will increase the maximum number of open files for your Server.
