An inactive cluster node has either become unreachable or has been stopped. When you delete a stopped cluster node, the operation does not remove cookie and other synchronized data. To find which cluster nodes are inactive, use the cluster_info command:

/opt/pingidentity/ase/bin/cli.sh cluster_info -u admin -p 
cluster id : ase_cluster
cluster nodes
127.0.0.1:8020 active
1.1.1.1:8020 active
2.2.2.2:8020 inactive
172.17.0.4:8020(tasks.aseservice) active
172.17.0.5:8020(tasks.aseservice) inactive
tasks.aseservice2:8020 not resolved

Using the cluster_info command output, you can remove the inactive cluster nodes 2.2.2.2:8020 and 172.17.0.5:8020.

To delete the inactive node, use the delete_cluster_node command:

/opt/pingidentity/ase/bin/cli.sh delete_cluster_node <IP:Port>