kubernetes: Pod scheduled event is unknown

What happened: I deployed a deployment workload, and then I ran kubectl describe pod and I found Schedule event’s timestamp is unknown:

Events: Type Reason Age From Message

---

Normal Scheduled <unknown> default-scheduler Successfully assigned default/canary-6758c6b466-5qnnp to master03 Normal Pulled 3m14s kubelet, master03 Container image “registry.aliyuncs.com/google_containers/echoserver:1.10” already present on machine Normal Created 3m14s kubelet, master03 Created container canary Normal Started 3m14s kubelet, master03 Started container canary

What you expected to happen: Timestamp of pod scheduled event was supposed to be 3m14s.

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Time in my host was Sat Aug 15 13:42:54 CST 2020 ( run date command ) Time in my kube-scheduler pod was Sat Aug 15 05:42:54 UTC 2020 ( run date command )

Environment:

• Kubernetes version: v1.18.5
• Cloud provider or hardware configuration: hardware configuration
• OS (e.g: cat /etc/os-release): centos 7.6
• Kernel (e.g. uname -a): 3.10.0-1062.18.1.el7.x86_64
• Others: This kuberntes cluster is set up by kubeadm.