{"record":{"id":"50f53f538feccff8","repo":"gastownhall/beads","slug":"capture-spawning-process-identity-w","errorCode":null,"errorMessage":"capture spawning process identity: %w","messagePattern":"capture spawning process identity: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/storage/dbproxy/proxy/endpoint.go","lineNumber":493,"sourceCode":"\t\t\targs = append(args, \"--external-keep-alive\", ext.KeepAlivePeriod.String())\n\t\t}\n\t}\n\n\tlogFile, err := os.OpenFile(opts.LogFilePath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o600) //nolint:gosec // G304: logFilePath is caller-derived (workspace path), not user-request input\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"open log file %q: %w\", opts.LogFilePath, err)\n\t}\n\n\tcmd := exec.Command(self, args...)\n\tcmd.Stdin = nil\n\tcmd.Stdout = logFile\n\tcmd.Stderr = logFile\n\tcmd.SysProcAttr = procAttrDetached()\n\n\tbirth, err := procid.Capture(os.Getpid())\n\tif err != nil {\n\t\t_ = logFile.Close()\n\t\treturn nil, fmt.Errorf(\"capture spawning process identity: %w\", err)\n\t}\n\tmarker := spawnMarker{\n\t\tSchema:      1,\n\t\tPID:         os.Getpid(),\n\t\tBirth:       string(birth),\n\t\tStopEpoch:   stopEpoch,\n\t\tStartedUnix: time.Now().Unix(),\n\t}\n\tif err := writeSpawnMarker(rootDir, marker); err != nil {\n\t\t_ = logFile.Close()\n\t\treturn nil, err\n\t}\n\n\t// The marker is durable before proxy.lock is released. Shutdown treats a\n\t// matching live owner as an in-progress start and waits; the child removes\n\t// it only after acquiring proxy.lock. This closes the release-before-Start\n\t// window without making the child deadlock on the parent's flock.\n\treleased = true","sourceCodeStart":475,"sourceCodeEnd":511,"githubUrl":"https://github.com/gastownhall/beads/blob/71377f276968b452ee607177637970a4ff888584/internal/storage/dbproxy/proxy/endpoint.go#L475-L511","documentation":"Returned by forkExecChild when procid.Capture(os.Getpid()) fails while recording the spawning process's identity (PID plus birth fingerprint) for the spawn marker. The marker lets later sessions verify whether the recorded spawner is still alive, so a failed capture aborts the spawn.","triggerScenarios":"forkExecChild (during GetCreateDatabaseProxyServerEndpoint) when procid.Capture cannot read the current process's birth information — e.g. /proc not mounted or unreadable, restricted procfs in a hardened container, or an unexpected OS-level process-inspection failure.","commonSituations":"Containers with masked or missing /proc entries; hardened sandboxes (seccomp/AppArmor) blocking /proc self inspection; very unusual environments (some CI runners, chroots without procfs).","solutions":["Ensure /proc is mounted and readable for the current process inside the container/sandbox.","Relax seccomp/AppArmor rules that deny reading /proc/self stat data for bd.","Run bd outside the restricted environment (host namespace or less hardened container) and retry.","Check the wrapped procid error to identify the exact sysctl/proc entry that failed."],"exampleFix":"// before: container masks /proc so identity capture fails\ndocker run --security-opt seccomp=restrictive image bd doctor\n// after: allow procfs reads / run with proc mounted\ndocker run -v /proc:/proc:ro --security-opt seccomp=unconfined image bd doctor","handlingStrategy":"validation","validationCode":"// Probe that procfs identity data is readable before spawning\nif b, err := os.ReadFile(\"/proc/self/stat\"); err != nil || len(b) == 0 {\n    return fmt.Errorf(\"procfs unreadable; procid.Capture will fail: %w\", err)\n}","typeGuard":null,"tryCatchPattern":"ep, err := GetCreateDatabaseProxyServerEndpoint(rootDir, opts)\nif err != nil && strings.Contains(err.Error(), \"capture spawning process identity\") {\n    return fmt.Errorf(\"environment blocks /proc inspection; run outside the hardened sandbox: %w\", err)\n}","preventionTips":["Ensure /proc is mounted (not masked) in containers running bd","Avoid seccomp/AppArmor profiles that deny /proc/self reads","Test proxy spawn inside your container image before shipping it","If identity capture fails repeatedly, run bd on the host namespace instead"],"tags":["go","process-identity","procfs","container"],"backgroundTag":"process-identity-capture-failed","analyzedSha":"71377f276968b452ee607177637970a4ff888584","analyzedAt":"2026-08-30T18:55:39.744Z","schemaVersion":2},"datasetVersion":"2026-08-30T23:17:21.991Z"}