[libvirt-users] can't establish more than 1000 connections with virsh

[dw]

Hi:

     I'm trying to connect with libvirtd with virsh from a remote PC,but 
only can establish 1000 connections.

     If try more connections,prompt:

     "error: failed to connect to the hypervisor
     error: Failed to open file '/etc/libvirt/libvirt.conf': Too many 
open files"

     I tried in another PC,also get the same prompt.

     Anybody know why?

     Thanks!


     environment:

     libvirt:libvirt-2.0.0-10.el7

     OS:centos7.3