Recover process with stuck fd call, from superuser.blog

recover_stuck_process.sh

# Find process information
ps aux | grep <name>
strace -p <pid>

ls -l /proc//fd
lrwx-- 1 sanket sanket 64 Feb 5 23:00 0 ->; /dev/pts/19
lrwx-- 1 sanket sanket 64 Feb 5 23:00 1 ->; /dev/pts/19
lrwx-- 1 sanket sanket 64 Feb 5 22:59 2 ->; /dev/pts/19
...
lrwx-- 1 sanket sanket 64 Feb 5 23:00 11 -> socket:[102286]

$ lsof -i -a -p <pid> | grep 102286

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
  
telnet 14480 sanket 3u IPv4 102286 0t0 TCP 192.168.1.2:59254 ->; maa03s21-in-f78.1e100.net:http (ESTABLISHED)

$ gdb -p <pid>
call close(11)