[EC2] インスタンス Tomcat 再起動失敗時の措置事項

変更日：木, 6月 12, 2025 で 4:01 午後

Environment
1. Tomcat is installed and operated separately on an EC2 instance.
2. Remote access to the EC2 instance running Tomcat is made from an on-premise VDI, not through a Bastion host.
3. When attempting to restart Tomcat after remotely connecting to the EC2 instance from the on-premise VDI, a Tomcat shutdown error occurs.
Action
1. Add Tomcat port to the Security Group of the EC2 instance running Tomcat as a loopback
  - Source: Security Group of the EC2 instance running Tomcat (Loopback)
  - Registered ports: Inbound rule: TCP / 8005, 8009, Outbound rule: TCP / 8009