{"record":{"id":"5112ecdded92b39e","repo":"ahmetb/kubectx","slug":"failed-to-switch-namespace-w","errorCode":null,"errorMessage":"failed to switch namespace: %w","messagePattern":"failed to switch namespace: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/kubens/fzf.go","lineNumber":75,"sourceCode":"\tcmd.Stdin = &in\n\tcmd.Stderr = stderr\n\tcmd.Stdout = &out\n\n\tcmd.Env = append(os.Environ(),\n\t\tfmt.Sprintf(\"%s=1\", env.EnvForceColor))\n\tif err := cmd.Run(); err != nil {\n\t\tvar exitErr *exec.ExitError\n\t\tif !errors.As(err, &exitErr) {\n\t\t\treturn err\n\t\t}\n\t}\n\tchoice := strings.TrimSpace(out.String())\n\tif choice == \"\" {\n\t\treturn errors.New(\"you did not choose any of the options\")\n\t}\n\tname, err := switchNamespace(kc, choice, false)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to switch namespace: %w\", err)\n\t}\n\t_ = printer.Success(stderr, \"Active namespace is \\\"%s\\\".\", printer.SuccessColor.Sprint(name))\n\treturn nil\n}\n","sourceCodeStart":57,"sourceCodeEnd":80,"githubUrl":"https://github.com/ahmetb/kubectx/blob/12ad6fb22e8c546ee2b54e7de38aa51c906832f7/cmd/kubens/fzf.go#L57-L80","documentation":"After the user picks a namespace in the fzf selector, Run calls switchNamespace(kc, choice, false) to mutate the kubeconfig's namespace for the context. Failures from that switch (e.g. the chosen line could not be mapped to a valid namespace, or writing the config failed) are wrapped as \"failed to switch namespace: %w\".","triggerScenarios":"The fzf selection (after TrimSpace) leads switchNamespace to return an error, such as an invalid namespace token from the formatted list or a kubeconfig write failure during the switch.","commonSituations":"Stale terminal state where the selected entry no longer matches the config; kubeconfig file not writable (permissions/readonly mount); aborted selection leaving an empty choice (that case has its own message, though).","solutions":["Read the wrapped error (%w) to see whether it is a config write (permissions) or lookup issue","Retry `kubens` and pick the namespace again; verify with `kubens -c` afterwards","Check file permissions on KUBECONFIG (~/.kube/config must be writable to switch)","If persistent, fix or regenerate the kubeconfig, or switch manually with `kubectl config set-context --current --namespace=<ns>`"],"exampleFix":"// before\n$ chmod 400 ~/.kube/config   # read-only, switch fails\n// after\n$ chmod 600 ~/.kube/config && kubens   # switch succeeds","handlingStrategy":"try-catch","validationCode":"if fi, err := os.Stat(kcPath); err != nil || fi.Mode().Perm()&0200 == 0 {\n    return errors.New(\"kubeconfig must be writable to switch namespace\")\n}","typeGuard":null,"tryCatchPattern":"if err := op.Run(stdout, stderr); err != nil {\n    if strings.Contains(err.Error(), \"failed to switch namespace:\") {\n        // check permissions on ~/.kube/config, retry selection,\n        // or fall back to: kubectl config set-context --current --namespace=<ns>\n    }\n    return err\n}","preventionTips":["Keep ~/.kube/config writable (mode 600) by the invoking user","Verify the switch with `kubens -c` after interactive selection","Avoid read-only mounts over ~/.kube during switching operations","Fall back to `kubectl config set-context --current --namespace=` on failure"],"tags":["go","kubeconfig","kubernetes","namespace","fzf"],"backgroundTag":"namespace-switch-failed","analyzedSha":"12ad6fb22e8c546ee2b54e7de38aa51c906832f7","analyzedAt":"2026-09-02T12:23:10.107Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T16:17:10.729Z"}