Why messages like following are seen in logs "udevd-work: error changing netif name 'ethx' to 'ethx': Device or resource busy" ?

Issue

• There are many messages in system log file like below;

Aug 18 16:06:20 HOSTNAME udevd-work[14557]: error changing netif name 'eth4' to 'eth2': Device or resource busy
Aug 18 16:06:32 HOSTNAME multipathd: sdaa: add path (uevent)
Aug 18 16:06:32 HOSTNAME multipathd: sdaa: spurious uevent, path already in pathvec
Aug 18 16:06:32 HOSTNAME multipathd: sdz: add path (uevent)
Aug 18 16:06:32 HOSTNAME multipathd: sdz: spurious uevent, path already in pathvec
Aug 18 16:06:32 HOSTNAME udevd-work[17158]: error changing netif name 'eth4' to 'eth2': Device or resource busy
Aug 18 16:06:32 HOSTNAME udevd-work[17156]: error changing netif name 'eth1' to 'eth0': Device or resource busy

• What could be the reason for generation for such messages and how to avoid it ?
• Are these messages harmful ?