{"record":{"id":"aecbe7011df36d72","repo":"cloudflare/cloudflared","slug":"errinsuficientfields","errorCode":"ErrInsuficientFields","errorMessage":"insufficient fields","messagePattern":"insufficient fields","errorType":"error_code","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"diagnostic/error.go","lineNumber":15,"sourceCode":"package diagnostic\n\nimport (\n\t\"errors\"\n)\n\nvar (\n\t// Error used when there is no log directory available.\n\tErrManagedLogNotFound = errors.New(\"managed log directory not found\")\n\t// Error used when it is not possible to collect logs using the log configuration.\n\tErrLogConfigurationIsInvalid = errors.New(\"provided log configuration is invalid\")\n\t// Error used when parsing the fields of the output of collector.\n\tErrInsufficientLines = errors.New(\"insufficient lines\")\n\t// Error used when parsing the lines of the output of collector.\n\tErrInsuficientFields = errors.New(\"insufficient fields\")\n\t// Error used when given key is not found while parsing KV.\n\tErrKeyNotFound = errors.New(\"key not found\")\n\t// Error used when there is no disk volume information available.\n\tErrNoVolumeFound = errors.New(\"no disk volume information found\")\n\t// Error user when the base url of the diagnostic client is not provided.\n\tErrNoBaseURL = errors.New(\"no base url\")\n\t// Error used when no metrics server is found listening to the known addresses list (check [metrics.GetMetricsKnownAddresses]).\n\tErrMetricsServerNotFound = errors.New(\"metrics server not found\")\n\t// Error used when multiple metrics server are found listening to the known addresses list (check [metrics.GetMetricsKnownAddresses]).\n\tErrMultipleMetricsServerFound = errors.New(\"multiple metrics server found\")\n\t// Error used when a temporary file creation fails within the diagnostic procedure\n\tErrCreatingTemporaryFile = errors.New(\"temporary file creation failed\")\n)\n","sourceCodeStart":1,"sourceCodeEnd":29,"githubUrl":"https://github.com/cloudflare/cloudflared/blob/2253eeeb25a44a713a4b60b8ba1e1b3f377d1a0f/diagnostic/error.go#L1-L29","documentation":"ErrInsuficientFields is a sentinel error in diagnostic/error.go thrown when parsing the fields of collector output. Parsers split each output line into whitespace-separated fields and require a minimum count (diskFieldsMinimum for disk volume lines, osInformationFieldsMinimum for OS information). When a line has fewer fields than required, the parser wraps this error with fmt.Errorf including expected vs. actual counts. Note the intentional (historical) single-'f' spelling of the identifier.","triggerScenarios":"ParseDiskVolumeInformationOutput when a disk-volume line splits into fewer than diskFieldsMinimum fields (diagnostic/system_collector_utils.go:88); ParseUnameOutput when OS information has fewer than osInformationFieldsMinimum fields (system_collector_utils.go:143); the same sentinel is also returned by ParseSysctlFileDescriptorInformation when its output lacks required fields.","commonSituations":"Collecting diagnostics inside containers whose busybox-style tools print fewer columns than GNU tools; containers mounting /proc or /sys with limited visible fields; remote diagnostics against hosts with different tool versions; translated/localized tool output altering column layout.","solutions":["Target the collection at an environment with standard tooling: use --diag-container-id / --diag-pod-id so the collector runs where field counts match expectations.","Check the target environment's tool output (e.g. run the underlying disk/uname commands manually) and, in containers, install full-featured (non-busybox) tools.","Force a standard locale (LC_ALL=C) for the diagnostics environment if localized output changes column counts.","Upgrade cloudflared if your platform's tool version emits a different column layout than the parser expects."],"exampleFix":"// before: busybox df prints fewer columns; parser errors\nFROM alpine\nRUN apk add busybox\n\n// after: full toolchain for diagnostics parsing\nFROM alpine\nRUN apk add --no-cache coreutils util-linux\nRUN apk add cloudflared","handlingStrategy":"validation","validationCode":"// Go: validate field count before handing the line to the parser\nfields := strings.Fields(line)\nif len(fields) < diskFieldsMinimum {\n    // skip malformed line instead of calling the parser\n}","typeGuard":"func hasMinFields(line string, min int) bool {\n    return len(strings.Fields(line)) >= min\n}","tryCatchPattern":"vols, err := diagnostic.ParseDiskVolumeInformationOutput(out, useUchar)\nif errors.Is(err, diagnostic.ErrInsuficientFields) {\n    log.Warn().Msg(\"unexpected column layout from system tools; skipping\")\n    return nil\n}","preventionTips":["Use full-featured tools (coreutils/util-linux) rather than busybox in images that run diagnostics.","Pin LC_ALL=C so localized output does not change column counts.","Cross-version test parsers against tool output from every supported platform.","Sanity-check field counts per line before invoking the parser in custom tooling."],"tags":["diagnostics","parsing","format","cloudflared"],"backgroundTag":"unexpected-response-shape","analyzedSha":"2253eeeb25a44a713a4b60b8ba1e1b3f377d1a0f","analyzedAt":"2026-09-06T04:14:33.757Z","contentChangedAt":"2026-09-06T04:14:33.757Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}