Description of problem:
Detailed error msg:
Apr 25 05:41:20 ip-10-0-214-218 hyperkube[1391]: E0425 05:41:20.937906    1391 cadvisor_stats_provider.go:151] "Unable to fetch pod etc hosts stats" err="failed to get stats failed command 'du' ($ nice -n 19 du -x -s -B 1) on path /var/lib/kubelet/pods/c90680d5-ce3f-4659-a6dc-039397952fb9/etc-hosts with error exit status 1" pod="openshift-dns/node-resolver-zm4g8"
Apr 25 05:41:20 ip-10-0-214-218 hyperkube[1391]: E0425 05:41:20.980666    1391 cadvisor_stats_provider.go:151] "Unable to fetch pod etc hosts stats" err="failed to get stats failed command 'du' ($ nice -n 19 du -x -s -B 1) on path /var/lib/kubelet/pods/c90680d5-ce3f-4659-a6dc-039397952fb9/etc-hosts with error exit status 1" pod="openshift-dns/node-resolver-zm4g8"

Found thousands of this kind of msg in one kubelet log.

Version-Release number of selected component (if applicable):
4.8.0-0.nightly-2021-04-24-234710

How reproducible:
Found it in OCP on AWS and OCP on Azure clusters, didn't check other cloud platforms.

For a cluster running about 2 hours, the error msg account:
sh-4.4# journalctl -u kubelet|grep "Unable to fetch pod etc hosts stats"|wc
   1593   65313  623218

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: