{"record":{"id":"9a4a5665de3cd4f6","repo":"ahmetb/kubectx","slug":"failed-to-read-namespace-of-s-w","errorCode":null,"errorMessage":"failed to read namespace of \"%s\": %w","messagePattern":"failed to read namespace of \"(.+?)\": %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/kubens/current.go","lineNumber":43,"sourceCode":"type CurrentOp struct{}\n\nfunc (c CurrentOp) Run(stdout, _ io.Writer) error {\n\tkc := new(kubeconfig.Kubeconfig).WithLoader(kubeconfig.DefaultLoader)\n\tdefer kc.Close()\n\tif err := kc.Parse(); err != nil {\n\t\treturn fmt.Errorf(\"kubeconfig error: %w\", err)\n\t}\n\n\tctx, err := kc.GetCurrentContext()\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to get current context: %w\", err)\n\t}\n\tif ctx == \"\" {\n\t\treturn errors.New(\"current-context is not set\")\n\t}\n\tns, err := kc.NamespaceOfContext(ctx)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to read namespace of \\\"%s\\\": %w\", ctx, err)\n\t}\n\t_, err = fmt.Fprintln(stdout, ns)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"write error: %w\", err)\n\t}\n\treturn nil\n}\n","sourceCodeStart":25,"sourceCodeEnd":51,"githubUrl":"https://github.com/ahmetb/kubectx/blob/12ad6fb22e8c546ee2b54e7de38aa51c906832f7/cmd/kubens/current.go#L25-L51","documentation":"CurrentOp.Run calls kc.NamespaceOfContext(ctx) to look up the default namespace for the current context. If that lookup fails, the error is wrapped as \"failed to read namespace of \\\"%s\\\": %w\", where %s is the context name. This means the library could not extract the namespace associated with the given context.","triggerScenarios":"kc.NamespaceOfContext is called with the current context name and returns an error, e.g. the context exists but its entry lacks a namespace field that the library cannot resolve, or the underlying config access fails.","commonSituations":"A context created without a namespace (common; usually defaults to \"default\") but whose stored data is malformed; KUBECONFIG merge producing a context stub without full details; tooling that rewrites the config and drops fields.","solutions":["Inspect the context with `kubectl config get-contexts <name>` and fix its namespace field","Set the namespace explicitly: `kubectl config set-context <name> --namespace=<ns>`","Check the wrapped error (%w) for the underlying kubeconfig-library cause and fix that root cause","Regenerate or restore the kubeconfig from your cluster provider if entries are corrupted"],"exampleFix":"// before\n# context entry missing namespace details\nkubectl config set-context prod-cluster --namespace=default\n// after\nkubens current   # now resolves the namespace successfully","handlingStrategy":"validation","validationCode":"ctx, _ := exec.Command(\"kubectl\", \"config\", \"current-context\").Output()\nctxName := strings.TrimSpace(string(ctx))\ncmd := exec.Command(\"kubectl\", \"config\", \"get-contexts\", ctxName, \"-o\", \"name\")\nif err := cmd.Run(); err != nil {\n    return fmt.Errorf(\"context %q incomplete in kubeconfig\", ctxName)\n}","typeGuard":null,"tryCatchPattern":"if err := op.Run(stdout, stderr); err != nil {\n    var ctxName string\n    if matches := regexp.MustCompile(`failed to read namespace of \"([^\"]+)\"`).FindStringSubmatch(err.Error()); matches != nil {\n        ctxName = matches[1]\n        // repair: kubectl config set-context ctxName --namespace=default\n    }\n    return err\n}","preventionTips":["Set an explicit namespace on contexts you create (kubectl config set-context --namespace=...)","Avoid tools that rewrite kubeconfig and drop context fields","Validate merged KUBECONFIG files periodically","Inspect wrapped errors to find the kubeconfig-library root cause"],"tags":["go","kubeconfig","kubernetes","namespace"],"backgroundTag":"kubeconfig-namespace-lookup-failed","analyzedSha":"12ad6fb22e8c546ee2b54e7de38aa51c906832f7","analyzedAt":"2026-09-02T12:23:10.107Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T16:17:10.729Z"}