{"record":{"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":925,"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":907,"sourceCodeEnd":943,"githubUrl":"https://github.com/gofiber/fiber/blob/a105acad6c1e4576a77f01e02973f67e962bb58d/app.go#L907-L943","documentation":"ReloadViews iterates registered view engines, takes a per-engine viewsLock, and calls Views.Load(). If the underlying template engine fails to (re)load templates (filesystem error, template parse error, permission denied), the wrapped error is returned as fmt.Errorf(\"fiber: failed to reload views: %w\", err).","triggerScenarios":"Calling app.ReloadViews() when template files have been deleted, are mid-write, contain syntax errors, or are unreadable due to permissions.","commonSituations":"Hot-reloading templates in development; deploying templates separately from the binary (race between reload and file replacement); running as a user without read access to the template dir; partial git checkout.","solutions":["Inspect the wrapped error (%w) for the engine-specific cause (parse error, ENOENT, EACCES).","Ensure template files exist, are fully written, and are readable before reload.","Validate templates in CI/pre-deploy before runtime reload.","Avoid reloading views on every request; reload on a signal or file-watch event."],"exampleFix":"// before\nif err := app.ReloadViews(); err != nil { log.Fatal(err) }\n\n// after\nif err := app.ReloadViews(); err != nil {\n    log.Printf(\"view reload failed (keeping previous templates): %v\", err)\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err := app.ReloadViews(); err != nil {\n    log.Printf(\"view reload failed; keeping previous templates: %v\", err)\n    // do not fatal: keep serving with the prior template set\n}","preventionTips":["Validate templates in CI before runtime reload.","Reload on file-watch/signal, not per request.","Ensure template files are fully written before reload (atomic rename)."],"tags":["views","templates","config","filesystem"],"backgroundTag":null,"analyzedSha":"a105acad6c1e4576a77f01e02973f67e962bb58d","analyzedAt":"2026-08-11T17:33:26.942Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}