{"record":{"id":"7c7cf33a3b12e67f","repo":"googleapis/mcp-toolbox","slug":"unable-to-validate-reloaded-edits-w","errorCode":null,"errorMessage":"unable to validate reloaded edits: %w","messagePattern":"unable to validate reloaded edits: %w","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"cmd/root.go","lineNumber":143,"sourceCode":"\n\t// Register subcommands\n\tcmd.AddCommand(invoke.NewCommand(opts))\n\tcmd.AddCommand(skills.NewCommand(opts))\n\tcmd.AddCommand(serve.NewCommand(opts))\n\tcmd.AddCommand(migrate.NewCommand(opts))\n\n\treturn cmd\n}\n\nfunc handleDynamicReload(ctx context.Context, cfg server.ServerConfig, s *server.Server) error {\n\tlogger, err := util.LoggerFromContext(ctx)\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\n\tsourcesMap, authServicesMap, embeddingModelsMap, toolsMap, promptsMap, groupsMap, err := validateReloadEdits(ctx, cfg)\n\tif err != nil {\n\t\terrMsg := fmt.Errorf(\"unable to validate reloaded edits: %w\", err)\n\t\tlogger.WarnContext(ctx, errMsg.Error())\n\t\treturn err\n\t}\n\n\ts.PrimitiveMgr.SetPrimitives(sourcesMap, authServicesMap, embeddingModelsMap, toolsMap, promptsMap, groupsMap)\n\n\treturn nil\n}\n\n// validateReloadEdits checks that the reloaded config configs can initialized without failing\nfunc validateReloadEdits(\n\tctx context.Context, cfg server.ServerConfig,\n) (map[string]sources.Source, map[string]auth.AuthService, map[string]embeddingmodels.EmbeddingModel, map[string]tools.Tool, map[string]prompts.Prompt, map[string]group.Group, error,\n) {\n\tlogger, err := util.LoggerFromContext(ctx)\n\tif err != nil {\n\t\tpanic(err)\n\t}","sourceCodeStart":125,"sourceCodeEnd":161,"githubUrl":"https://github.com/googleapis/mcp-toolbox/blob/8cc6e09de2ad7b8bffc77751799585a1401a48eb/cmd/root.go#L125-L161","documentation":"During dynamic config reload, `handleDynamicReload` calls `validateReloadEdits` and, if validation of the reloaded configuration fails, logs \"unable to validate reloaded edits: %w\" as a warning and returns the error. This means the edited config files picked up by the file watcher could not be initialized into server primitives (sources, auth services, embedding models, tools, prompts, groups). Crucially, the server keeps running with the previously loaded config — the bad reload is rejected, not fatal.","triggerScenarios":"Editing a watched YAML config file while `toolbox serve --watch` (or equivalent folder watching) is active and the new content fails `InitializeConfigs` — e.g. a YAML syntax error, unknown tool/source kind, missing env var, or invalid group reference introduced by the edit.","commonSituations":"Saving a half-finished edit in an editor (partial YAML); renaming an env var referenced by a source; adding a tool with a typo'd `kind:`; CI/scripts rewriting configs in place while the server watches them.","solutions":["Read the wrapped error after the warning in the server logs — it names the exact parse/init failure and file","Fix the edited config file and save again; the watcher will retry the reload on the next change","Compare against the last-known-good config (git diff) to spot what broke","If the edit was intentional but invalid (e.g. missing env var), set the required environment variables then re-trigger a reload by touching the file","The running server is unaffected — no restart is needed; the old config continues to serve"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// Pre-validate edited configs before the watcher reloads them\nfunc configValid(path string) error {\n\tb, err := os.ReadFile(path)\n\tif err != nil { return err }\n\tvar m map[string]any\n\treturn yaml.Unmarshal(b, &m)\n}","typeGuard":null,"tryCatchPattern":"if err := validateReloadEdits(ctx, cfg); err != nil {\n\tlogger.WarnContext(ctx, fmt.Sprintf(\"keeping previous config; reload rejected: %v\", err))\n\treturn err\n}","preventionTips":["Validate edited YAML with a linter or `toolbox serve --config-file <f>` before saving while a watcher runs","Avoid partial saves — write configs atomically (write temp file, then rename)","Keep required env vars set in the server process environment","Monitor the warning logs after each config edit; the old config keeps serving until a valid one reloads"],"tags":["go","hot-reload","config","watch","server"],"backgroundTag":"config-reload-validation-failed","analyzedSha":"8cc6e09de2ad7b8bffc77751799585a1401a48eb","analyzedAt":"2026-09-05T01:10:36.887Z","contentChangedAt":"2026-09-05T01:10:36.887Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}