socket.accept error 24: To many open files

You can also do this from your python code like below

import resource
resource.setrlimit(resource.RLIMIT_NOFILE, (65536, 65536))

The second argument is tuple (soft_limit, hard_limit). The hard limit is the ceiling for the soft limit. The soft limit is what is actually enforced for a session or process. This allows the administrator (or user) to set the hard limit to the maximum usage they wish to allow. Other users and processes can then use the soft limit to self-limit their resource usage to even lower levels if they so desire.

Params that configure max open connections.

at /etc/sysctl.conf

add:

net.core.somaxconn=131072
fs.file-max=131072

and then:

sudo sysctl -p

at /usr/include/linux/limits.h

change:

NR_OPEN = 65536

at /etc/security/limits.conf

add:

*                soft    nofile          65535
*                hard    nofile          65535