My environement is elasticsearch 5.3.0
During the start up of elasticsearch process , I see below warning.
[2017-04-05T07:24:29,481][WARN ][i.n.u.i.MacAddressUtil ] Failed to find a usable hardware address from the network interfaces; using random bytes: f0:71:d1:7e:9e:87:9e:62
Is there a setting where you statically set MAC address? It looks like the process is not reading neither from /etc/sysconfig/network-scripts/ifcfg-* nor ip link command.