snapd udevmon.go:184: udev monitor observed remove event for unknown device

Question

I'm seeing these messages in the syslog on 18.10. How can I fix this? I've searched around and not found any solutions. The two entries that occur approx. every hour in syslog are:

snapd[1893]: udevmon.go:184: udev monitor observed remove event for unknown device "/sys/dentry(3271:phpsessionclean.service)"

snapd[1893]: udevmon.go:184: udev monitor observed remove event for unknown device "/sys/proc_inode_cache(3279:phpsessionclean.service)"

Output:

$ dpkg -S phpsessionclean.service
php-common: /lib/systemd/system/phpsessionclean.service

Output:

$ dpkg -S udevmon.go
dpkg-query: no path found matching pattern *udevmon.go*

Answer 1

It appears to be a debug message which you can just ignore https://forum.snapcraft.io/t/log-snapd-and-btrfs-message/9809