{"id":"9d32e6037bef1db2","repo":"gofiber/fiber","slug":"fiber-failed-to-reload-views-w","errorCode":null,"errorMessage":"fiber: failed to reload views: %w","messagePattern":"fiber: failed to reload views: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"app.go","lineNumber":924,"sourceCode":"\t}\n\n\tvar reloaded bool\n\tfor _, targetApp := range apps {\n\t\tif targetApp == nil || targetApp.config.Views == nil {\n\t\t\tcontinue\n\t\t}\n\n\t\tif viewValue := reflect.ValueOf(targetApp.config.Views); viewValue.Kind() == reflect.Pointer && viewValue.IsNil() {\n\t\t\tcontinue\n\t\t}\n\n\t\tif err := func() error {\n\t\t\tviewsLock := getViewsLock(targetApp.config.Views)\n\t\t\tviewsLock.Lock()\n\t\t\tdefer viewsLock.Unlock()\n\n\t\t\tif err := targetApp.config.Views.Load(); err != nil {\n\t\t\t\treturn fmt.Errorf(\"fiber: failed to reload views: %w\", err)\n\t\t\t}\n\n\t\t\treturn nil\n\t\t}(); err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\treloaded = true\n\t}\n\n\tif !reloaded {\n\t\treturn ErrNoViewEngineConfigured\n\t}\n\n\treturn nil\n}\n\n// SetTLSHandler Can be used to set ClientHelloInfo when using TLS with Listener.","sourceCodeStart":906,"sourceCodeEnd":942,"githubUrl":"https://github.com/gofiber/fiber/blob/9a4c7e57fe0b080a04235d28a4b0d2b4b353d58c/app.go#L906-L942","documentation":"Returned by App.ReloadViews (app.go:924) when calling targetApp.config.Views.Load() fails. ReloadViews iterates over the app and all mounted apps with a configured Views engine, acquires a per-engine lock, and re-executes the engine's Load — any template parse error, missing template file, or filesystem read failure is wrapped into this error. It also returns ErrNoViewEngineConfigured if no engine is configured at all.","triggerScenarios":"Calling app.ReloadViews() (e.g. to pick up template edits at runtime) when a template contains a syntax error, references a missing partial, or the templates directory was removed/moved. Also triggered after deploying a template change with a syntax error and triggering a reload.","commonSituations":"Hot-reloading templates in development; deploying a broken template that passes CI but fails on the production parser; filesystem permission issues on the templates dir; mounted sub-apps whose views are independently broken.","solutions":["Inspect the wrapped error (fmt.Errorf %w) to find the offending template and parse message.","Validate templates in CI / at startup (a deliberate ReloadViews call) before serving traffic.","Ensure the Views engine Root/FileSystem path is correct and readable by the process.","Keep ReloadViews failures non-fatal in the request path; log and retain the previously loaded templates."],"exampleFix":"// before\nif err := app.ReloadViews(); err != nil { log.Fatal(err) }\n\n// after — validate, don't crash the process\nif err := app.ReloadViews(); err != nil {\n    log.Errorf(\"view reload failed (keeping previous templates): %v\", err)\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err := app.ReloadViews(); err != nil {\n    // keep previous templates; don't crash the process\n    log.Errorf(\"view reload failed: %v\", err)\n}","preventionTips":["Validate templates in CI with a startup ReloadViews call before deploying.","Keep ReloadViews non-fatal in the request path — log and retain prior templates.","Ensure the Views engine Root/FS path is readable by the process."],"tags":["views","template","reload","filesystem"],"analyzedSha":"9a4c7e57fe0b080a04235d28a4b0d2b4b353d58c","analyzedAt":"2026-08-04T21:44:03.395Z","schemaVersion":2}