What Can I Do If the CPU Usage of a Blockchain Node Reaches 100%?

The user node may have been attacked by viruses. If this happens, perform the following operations:

• Use strong passwords that meet the requirements for all accounts (including system accounts and application accounts).
• Use security groups to control access over specific ports. For special service ports, use fixed source IP addresses, VPNs, or bastion hosts to establish your own O&M channel.
• Periodically back up data (VM internal backup, remote backup, and backup on and off the cloud) to protect data against encrypting ransomware attacks.