[cloud-event-proxy]: empty interface shows up in metrics

[nmathew]

when running the node with 3 BC configurations, sometimes an empty interface in HOLDOVER state shows up in metrics.

node_ptp_clock_state{iface="",node="node1",process="ptp4l"} 2
node_ptp_clock_state{iface="CLOCK_REALTIME",node="node1",process="phc2sys"} 1
node_ptp_clock_state{iface="enp175s0fx",node="node1",process="ptp4l"} 1
node_ptp_clock_state{iface="enp220s0fx",node="node1",process="ptp4l"} 1
node_ptp_clock_state{iface="enp24s0fx",node="node1",process="ptp4l"} 1

Below is the versions of components we are running.

cloud-event-proxy 4.18 branch with last synced commit 9a58610(last commit on our build).
linuxptp-daemon 4.18 branch with last synced commit f1dfc15( last commit on our build).

@aneeshkp raising the issue based our discussions.

Thanks in advance.
-Nobin

[nocturnalastro]

Looks like at some point the alias wasn't set. Odd that it would be holdover though. Does it only happen in holdover?

[nmathew]

Yes, In all the cases we found it was in holdover state.

[nmathew]

Another occurrence with FREERUN state, same software bundle.

#HELP node_ptp_clock_state 0 = FREERUN, 1 = LOCKED, 2 = HOLDOVER
#TYPE node_ptp_clock_state gauge
node_ptp_clock_state{iface="",node="node1",process="ptp4l"} 0
node_ptp_clock_state{iface="CLOCK_REALTIME",node="node1",process="phc2sys"} 1
node_ptp_clock_state{iface="ens1fx",node="node1",process="ptp4l"} 1
node_ptp_clock_state{iface="ens2fx",node="node1",process="ptp4l"} 1

[nocturnalastro]

Is this still an issue with an updated version?