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Description of problem:
Without NetworkManager dhclient creates lease file in /var/lib/dhclient/ in format dhclient-{uid}-{iface}.lease. I'm not sure, what is uid, but comparing with dhclient-4.2.5-47.el7, new version has uid blank.

Version-Release number of selected component (if applicable):
dhclient-4.2.5-58.el7

How reproducible:
always on my system

Steps to Reproduce:
1. systemctl stop NetworkManager
2. systemctl restart network
3. ps -ef | grep dhclient

Actual results:
root     10858     1  0 03:18 ?        00:00:00 /sbin/dhclient -1 -q -lf /var/lib/dhclient/dhclient--eth0.lease -pf /var/run/dhclient-eth0.pid -H qeos-117 eth0


Expected results:
root      9796  0.0  0.6 112820 12788 ?        Ss   03:20   0:00 /sbin/dhclient -H qeos-124 -1 -q -lf /var/lib/dhclient/dhclient-a3cbc97c-53c9-4cec-bd7d-51054f677d9a-eth0.lease -pf /var/run/dhclient-eth0.pid eth0


Additional info:

Hi Leos,

initscripts (not dhclient) takes UUID from ifcfg- file (one in /etc/sysconfig/network-scripts/ifcfg-<iface> name).  As this parameter is not mandatory it can be skipped and in that case you'll have blank uuid and "--" in leases filename.
Please confirm it's the case for you.

Closing as per https://bugzilla.redhat.com/show_bug.cgi?id=1462091#c2
Feel free to open bug on initscripts if it's not the case and uuid is missed even if it was properly specified in ifcfg file

Pavel, you're right. My 7.3 machine has uuid generated in ifcfg, but 7.4 not. Thanks for explanation.