Error Comparisons helps teams distinguish look-alike failures before they pick the wrong remediation path. Each guide maps decision signals, boundary conditions, and fix differences across HTTP, AWS, Azure, and GCP error scenarios. Use these pages when incident triage is ambiguous and response time is critical.
Showing 1-10 of 10.
Fix 401 Unauthorized vs 403 Forbidden by separating authentication failures from authorization denials, then apply the right login or permission fix fast.
Use 403 for explicit access denial, or 404 to conceal resource existence when security policy requires reducing endpoint and object enumeration risk.
Learn when to return 404 (missing or temporary absence) versus 410 (intentional permanent removal), including redirect and cache implications.
Fix API payload issues faster by using 400 for malformed syntax and 422 for semantic validation failures, so clients correct format before business rules.
Choose 412 when If-Match or If-Unmodified-Since checks fail; choose 409 for state conflicts without failed precondition headers during concurrent updates.
Use 429 for caller-specific throttling and 503 for service-wide outages, so retry behavior, escalation paths, and incident ownership stay correct.
Debug 500 vs 502 faster: use 500 for origin failures and 502 for invalid upstream responses at gateways, then route incidents to the right team.
Fix upstream errors faster: use 502 when a gateway gets an invalid upstream response, and 504 when the upstream service exceeds your timeout budget.
Compare AWS ThrottlingException and GCP RESOURCE_EXHAUSTED to separate rate limiting from quota/resource exhaustion and choose the remediation path.
Compare AWS AccessDenied and GCP PERMISSION_DENIED to isolate authorization deny layers, separate auth failures, and apply precise IAM fixes fast.