watch chan error: etcdserver: mvcc: required revision has been compacted

[egoisz]

Environmental Info:
K3s Version:

k3s version v1.21.5+k3s1 (acad8ef)
go version go1.16.8

Node(s) CPU architecture, OS, and Version:

Linux k3s-20-222 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Cluster Configuration:

1 servers, 1 agents
Describe the bug:

the log of k3s

systemctl status k3s -l
Nov 08 09:11:40 k3s-20-222 k3s[10410]: W1108 09:11:40.326219   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 09:23:47 k3s-20-222 k3s[10410]: W1108 09:23:47.642181   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 09:30:00 k3s-20-222 k3s[10410]: W1108 09:30:00.860078   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 09:45:31 k3s-20-222 k3s[10410]: W1108 09:45:31.266069   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 10:00:57 k3s-20-222 k3s[10410]: W1108 10:00:57.741565   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 10:09:19 k3s-20-222 k3s[10410]: W1108 10:09:19.904802   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 10:24:12 k3s-20-222 k3s[10410]: W1108 10:24:12.849281   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 10:33:10 k3s-20-222 k3s[10410]: W1108 10:33:10.094465   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 10:42:12 k3s-20-222 k3s[10410]: W1108 10:42:12.277049   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted
Nov 08 10:50:21 k3s-20-222 k3s[10410]: W1108 10:50:21.649804   10410 watcher.go:220] watch chan error: etcdserver: mvcc: required revision has been compacted

Steps To Reproduce:

• Installed K3s:

Expected behavior:

i use outside etcd cluster;
etcd version is etcd-v3.3.15

Do I need to upgrade the etcd version？

[brandond]

It is normal to see that message from time to time. It does not indicate a problem with your cluster.

That said, Kubernetes up through 1.21 normally uses etcd 3.4. Kubernetes 1.22 and newer uses etcd 3.5.

[egoisz]

It is normal to see that message from time to time. It does not indicate a problem with your cluster.

That said, Kubernetes up through 1.21 normally uses etcd 3.4. Kubernetes 1.22 and newer uses etcd 3.5.

I got it. Thank you.