{"record":{"id":"79af286dcaa5f907","repo":"hashicorp/nomad","slug":"failed-to-determine-the-nomad-executable-v","errorCode":null,"errorMessage":"Failed to determine the nomad executable: %v","messagePattern":"Failed to determine the nomad executable: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"helper/discover/discover.go","lineNumber":26,"sourceCode":"\t\"os\"\n\t\"os/exec\"\n\t\"path/filepath\"\n\t\"runtime\"\n\t\"strings\"\n)\n\n// NomadExecutable checks the current executable, then $GOPATH/bin, and finally\n// the CWD, in that order. If it can't be found, an error is returned.\nfunc NomadExecutable() (string, error) {\n\tnomadExe := \"nomad\"\n\tif runtime.GOOS == \"windows\" {\n\t\tnomadExe = \"nomad.exe\"\n\t}\n\n\t// Check the current executable.\n\tbin, err := os.Executable()\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"Failed to determine the nomad executable: %v\", err)\n\t}\n\n\tif _, err := os.Stat(bin); err == nil && isNomad(bin, nomadExe) {\n\t\treturn bin, nil\n\t}\n\n\t// Check the $PATH\n\tif bin, err := exec.LookPath(nomadExe); err == nil {\n\t\treturn bin, nil\n\t}\n\n\t// Check the $GOPATH.\n\tbin = filepath.Join(os.Getenv(\"GOPATH\"), \"bin\", nomadExe)\n\tif _, err := os.Stat(bin); err == nil {\n\t\treturn bin, nil\n\t}\n\n\t// Check the CWD.","sourceCodeStart":8,"sourceCodeEnd":44,"githubUrl":"https://github.com/hashicorp/nomad/blob/482b49bf1aec006f089bcfc7e632d8f6ac303e5e/helper/discover/discover.go#L8-L44","documentation":"NomadExecutable() in helper/discover locates a nomad binary, starting with the currently running executable. This error wraps os.Executable() failure, meaning Go could not determine the path of the running process — before any nomad-specific lookup even happens. It is a test-infrastructure helper, so the error usually signals an unusual process environment rather than a missing nomad binary.","triggerScenarios":"Calling NomadExecutable() when os.Executable() fails, e.g. the executable file was deleted or renamed after process start (Linux: 'no such file or directory' on /proc/self/exe), or the platform API fails (Windows: ERROR_ACCESS_DENIED on GetModuleFileName).","commonSituations":"Running a compiled test binary whose file was overwritten/deleted mid-run ('text file busy' then removed); embedded or ephemeral execution environments (deleted tmp binaries); unpacked/locked executables on Windows that GetModuleFileName cannot resolve.","solutions":["Read the wrapped cause; on Linux re-download/restore the deleted test binary and rerun.","Rebuild the test binary (go test -c) if the file on disk was replaced or removed while running.","Run tests from a normal filesystem path (not a tmpfs cleaned mid-run) so the running binary persists.","Ensure the process has permission to stat its own executable path (check AV/EDR interference on Windows)."],"exampleFix":"// before\nexe, err := discover.NomadExecutable() // fails: binary deleted mid-run\n// after\n// rebuild and rerun from a stable path:\n// go test -c -o /var/tmp/nomad.test ./... then run /var/tmp/nomad.test\nexe, err := discover.NomadExecutable()","handlingStrategy":"try-catch","validationCode":null,"typeGuard":"func isExecutablePathError(err error) bool {\n\treturn err != nil && strings.Contains(err.Error(), \"Failed to determine the nomad executable\")\n}","tryCatchPattern":"bin, err := discover.NomadExecutable()\nif err != nil {\n\tif isExecutablePathError(err) {\n\t\tlog.Warn(\"cannot resolve own executable; rebuild test binary and rerun\")\n\t\treturn err\n\t}\n\treturn err\n}","preventionTips":["Do not delete/overwrite a running test binary; build to a new name and restart","Run tests from stable filesystem paths, not tmp dirs cleaned mid-run","Rebuild test binaries after moving the repo or switching branches","On Windows, check AV/EDR locks that block GetModuleFileName"],"tags":["discovery","executable-path","testing","os"],"backgroundTag":"executable-not-found-in-path","analyzedSha":"482b49bf1aec006f089bcfc7e632d8f6ac303e5e","analyzedAt":"2026-09-04T07:54:14.808Z","contentChangedAt":"2026-09-04T07:54:14.808Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}