{"record":{"id":"52be934f2e942635","repo":"juicedata/juicefs","slug":"error-checking-pprof-alive-v","errorCode":null,"errorMessage":"error checking pprof alive: %v","messagePattern":"error checking pprof alive: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/debug.go","lineNumber":255,"sourceCode":"\tdefer func(body io.ReadCloser) {\n\t\tif err := body.Close(); err != nil {\n\t\t\tlogger.Errorf(\"error closing body: %v\", err)\n\t\t}\n\t}(resp.Body)\n\tbody, err := io.ReadAll(resp.Body)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"error reading response: %v\", err)\n\t}\n\n\treturn body, nil\n}\n\n// check pprof service status\nfunc checkPort(port int, amp string) error {\n\turl := fmt.Sprintf(\"http://localhost:%d/debug/pprof/cmdline?debug=1\", port)\n\tresp, err := getRequest(url, 3*time.Second)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"error checking pprof alive: %v\", err)\n\t}\n\tresp = bytes.ReplaceAll(resp, []byte{0}, []byte{' '})\n\tfields := strings.Fields(string(resp))\n\tflag := false\n\tfor _, field := range fields {\n\t\tif amp == field {\n\t\t\tflag = true\n\t\t}\n\t}\n\tif !flag {\n\t\treturn fmt.Errorf(\"mount point mismatch: \\n%s\\n%s\", resp, amp)\n\t}\n\treturn nil\n}\n\ntype metricItem struct {\n\tname, url string\n}","sourceCodeStart":237,"sourceCodeEnd":273,"githubUrl":"https://github.com/juicedata/juicefs/blob/c9a67b23e8e08ec23ec331aa6f1675e2319e921c/cmd/debug.go#L237-L273","documentation":"Returned by checkPort during `juicefs debug` when the probe GET to the pprof cmdline endpoint fails entirely (connection refused/timeout). It means the pprof service on the discovered port is not reachable, so the port either is wrong or the service died.","triggerScenarios":"Thrown at cmd/debug.go:255 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Verify the mount process still runs and the agent exported the pprof port","Check firewall/localhost access to the pprof port"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"c9a67b23e8e08ec23ec331aa6f1675e2319e921c","analyzedAt":"2026-09-06T17:55:48.476Z","contentChangedAt":"2026-09-06T17:55:48.476Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}