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api
Cascade Created Duplicate API Endpoints
API has duplicate endpoints with the same path and method after Cascade generated new controller methods. This causes routing conflicts where requests hit the wrong handler, or Spring Boot fails to start due to ambiguous endpoint definitions.
Cascade generated endpoints without checking for existing implementations.
Error Messages You Might See
Ambiguous handler methods for request
Conflicting request mappings
Handler already registered for path
Duplicate endpoint definition
Common Causes
- Cascade added @GetMapping("/api/users") when it already exists in same controller
- Cascade added new controller with overlapping routes as existing controller
- Path parameter mismatches: /users/{id} and /users/{userId} treated as duplicates
- Cascade didn't check base @RequestMapping value on controller class
How to Fix It
Search codebase for duplicate @RequestMapping/@GetMapping/@PostMapping annotations. Verify each unique path is handled by only one method. Review Cascade's generated code and remove duplicate endpoints. Consolidate logic if both versions handle same functionality. Run './gradlew compileKotlin' to detect conflicts.
Real developers can help you.
Sage Fulcher
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Stanislav Prigodich
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hanson1014
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Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
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Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews.
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I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
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Alvin Voo
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- Founder of Chessigma (1M+ users) & many small projects
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Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
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You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I find duplicate endpoints?
Use IDE search for @RequestMapping/@GetMapping/@PostMapping. Check both method names and full path (base + method path).
Can two endpoints have same method and path?
No, only one handler per HTTP method+path. Different path params (@PathVariable) create different routes.