evutil_ make_ internal_ pipe_: pipe: Too many open files

#10 0x00007f1fa8a97ce9 in __run_exit_handlers () from /lib64/libc.so.6
#11 0x00007f1fa8a97d37 in exit () from /lib64/libc.so.6
#12 0x00007f1fa998ba38 in event_exit ([email protected]=1) at log.c:103
#13 0x00007f1fa998bde7 in event_sock_err ([email protected]=1, sock=<optimized out>, [email protected]=0x7f1fa99a4309 "%s: socketpair") at log.c:140
#14 0x00007f1fa998d9a3 in evsig_init_ ([email protected]=0x7f1e8de01000) at signal.c:187
#15 0x00007f1fa998cd08 in epoll_init (base=0x7f1e8de01000) at epoll.c:220
#16 0x00007f1fa9984e8c in event_base_new_with_config ([email protected]=0x7f1e8de00000) at event.c:652
#17 0x00007f1fa9984ffb in event_base_new () at event.c:485