if hdactl-2.44 gets updated before hda-platform--4.0-23 or later, the DHCP server stops
the work around is this:
yum clean metadata yum -y update hda-platform
the problem: hdactl went out live before hda-platform. many systems picked it up first. some machines stayed without DHCPD for ~60 minutes. depending on the caching, maybe more.
what happened was that hdactl could not handle the lack of lease_time variables in the DB and it generated dhcpd.conf files which were syntactically incorrect. so the servers would see this:
/etc/dhcpd.conf line 20: expecting a parameter or declaration #011max-lease-time ; ^ Configuration file errors encountered -- exiting
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