how to update the etcd member list

my cluster have 3 master node, now I have shutdown 1 master node, then I check the member from etcd database:

[root@fat001 bin]# ETCDCTL_API=3 /opt/k8s/bin/etcdctl member list
56298c42af788da7, started, azshara-k8s02, https://172.19.104.230:2380, https://172.19.104.230:2379
5ab2d0e431f00a20, started, azshara-k8s01, https://172.19.104.231:2380, https://172.19.104.231:2379
84c70bf96ccff30f, started, azshara-k8s03, https://172.19.150.82:2380, https://172.19.150.82:2379

still show 3 nodes started. why the etcd did not refresh the node status? what should I do to update the etcd status to the latest? is it possible to refresh the status manually? the kubernetes version is 1.15.x.

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