When viewing conntrack-sync statistics, the conntrackd warning is shown:
$ show conntrack-sync statistics Main Table Statistics: [Sat Apr 24 15:24:30 2021] (pid=23266) [warning] deprecated nice configuration, ignoring. The nice value can be set externally with nice(1) and renice(1). [Sat Apr 24 15:24:30 2021] (pid=23266) [warning] deprecated unix backlog configuration, ignoring. cache internal: current active connections: 985 connections created: 225223 failed: 0 connections updated: 586887 failed: 0 connections destroyed: 224238 failed: 0 cache external: current active connections: 10 connections created: 718 failed: 0 connections updated: 289 failed: 0 connections destroyed: 708 failed: 0 traffic processed: 0 Bytes 0 Pckts multicast traffic (active device=eth1.10): 63645516 Bytes sent 717544 Bytes recv 830530 Pckts sent 22973 Pckts recv 0 Error send 0 Error recv message tracking: 0 Malformed msgs 0 Lost msgs
It seems like Nice config value has been deprecated:
Nice <value>
Deprecated. Conntrackd ignores this option and it will be removed in the future. Please note that you can run nice(1) and renice(1) externally. Also note that conntrackd(8) now uses by default a RT scheduler.