👀 Views: 1 💬 Answers: 1 📅 Created: 2025-06-11

oci spring-boot load-balancer health-check Java

I recently switched to I've hit a wall trying to I'm working with an scenario where the health check configured for my OCI Load Balancer is constantly failing for a custom backend set that points to my Spring Boot application. The application itself is running without any issues, and I can access it directly via the public IP, but the Load Balancer reports that the backend is unhealthy. The health check is set to use the default HTTP option with a specific path `/health` that returns a 200 OK response. I've checked the following: - The Spring Boot application is responding to HTTP requests on port 8080, and I can confirm this with curl from my terminal: ```bash curl -I http://<public-ip>:8080/health ``` which returns: ``` HTTP/1.1 200 OK ``` - The Load Balancer's health check configuration is set to: - Protocol: HTTP - Port: 8080 - URL path: `/health` - Health check interval: 30 seconds - Healthy threshold: 2 - Unhealthy threshold: 2 However, I keep getting the health check log showing: ``` Health Check Failed for Backend Set: <backend-set-name> ``` I also checked the security lists and network security groups associated with both the Load Balancer and the backend compute instance, ensuring that port 8080 is open for incoming traffic. Here is the relevant snippet from my Spring Boot application: ```java @RestController public class HealthController { @GetMapping("/health") public ResponseEntity<String> health() { return ResponseEntity.ok("Healthy"); } } ``` I'm puzzled as to why the Load Balancer would unexpected result the health check when everything appears to be configured correctly. Is there something specific I might be overlooking, or is there a recommended practice for configuring health checks in OCI for Spring Boot applications? Any insights or suggestions would be greatly appreciated! This is part of a larger web app I'm building. Has anyone else encountered this? The stack includes Java and several other technologies. Hoping someone can shed some light on this.