node.js - Tcp server not accepting connection after certain time -

i implementing tcp server in nodejs accepts connections gps devices , code being monitored forever. code not crashing after time server not accepting new connections. once restart server works fine again. don't have clue whats wrong. os ubuntu 14.04. appreciated.

edit:

time after server not accepting connections around 6 days.

net.createserver(function(sock){     sock.on('data',function(data){          //converting data ascii.          //parsing data,doing calculation          //fetching user_id redis.(i device id gps device, there user_id associated device ids).           //posting api using rest-client      }); }); 

edit 2: there size of virtual memory. virtual memory size around 940mb. ?

i've worked depeloping same type of system, question have nostalgia me. problem file descriptor:

in unix , related computer operating systems, file descriptor (fd, less fildes) abstract indicator (handle) used access file or other input/output resource, such pipe or network connection.

then, need increase file descriptor limit in linux server follow:

edit kernel parameter file /etc/sysctl.conf. add line fs.file-max=[new value] it.

 vim /etc/sysctl.conf   fs.file-max = 500000 

apply changes:

sysctl -p 

to change ulimit setting, edit file /etc/security/limits.conf , set hard , soft limits.

vi /etc/security/limits.conf * soft nofile 90000 * hard nofile 90000 

apply changes:

reboot 

now test new system settings using following commands:

#ulimit -a open files (-n) 90000 

check current open file descriptor limit:

# more /proc/sys/fs/file-max 500000 

tip1: find out how many file descriptors being used

# more /proc/sys/fs/file-nr 

tip2: add conjob restart socket server (node.js app) each week. hope helps.