Log in to the compute node, and run the following commands successively. After settings, reconnect the compute node on the UI.
[root@10-0-5-87 ~]# kill -HUP `pgrep collectdmon
[root@10-0-5-87 ~]# service virtlogd restart
[root@10-0-5-87 ~]# service libvirtd restart
[root@10-0-5-87 ~]# service zstack-kvmagent restart