First, a big thank you to all pool operators! I recently discovered ntppool and will be adding a server soon.
While playing around with some of the results of querying pool servers I noticed something I was not expecting. I have seen a small number of servers advertise a leap second. For example the following servers are currently advertising a leap second:
pool server reference_clock_identifier_ip 18.104.22.168 127.67.113.92 22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206 220.127.116.11 18.104.22.168 22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206 220.127.116.11 18.104.22.168 22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206 220.127.116.11 18.104.22.168 22.214.171.124 126.96.36.199
Can somebody explain this to me? Why do they think they should be advertising a leap second?
To be clear I am not seeing an issue with these pool servers, I am merely curious and want to understand how / why this is happening.