{"record":{"id":"420e6c5c02a1445b","repo":"cloudflare/cloudflared","slug":"checksum-validation-matches-currently-running-proc","errorCode":null,"errorMessage":"checksum validation matches currently running process","messagePattern":"checksum validation matches currently running process","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"cmd/cloudflared/updater/workers_update.go","lineNumber":107,"sourceCode":"\t\treturn err\n\t}\n\n\tdownloadSum, err := cliutil.FileChecksum(newFilePath)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\t// Check that the file downloaded matches what is expected.\n\tif v.checksum != downloadSum {\n\t\treturn errors.New(\"checksum validation failed\")\n\t}\n\n\t// Check if the currently running version has the same checksum\n\tif downloadSum == buildInfo.Checksum {\n\t\t// Currently running binary matches the downloaded binary so we have no reason to update. This is\n\t\t// typically unexpected, as such we emit a sentry event.\n\t\tlocalHub := sentry.CurrentHub().Clone()\n\t\terr := errors.New(\"checksum validation matches currently running process\")\n\t\tlocalHub.CaptureException(err)\n\t\t// Make sure to cleanup the new downloaded file since we aren't upgrading versions.\n\t\tos.Remove(newFilePath)\n\t\treturn err\n\t}\n\n\toldFilePath := fmt.Sprintf(\"%s.old\", v.targetPath)\n\t// Windows requires more effort to self update, especially when it is running as a service:\n\t// you have to stop the service (if running as one) in order to move/rename the binary\n\t// but now the binary isn't running though, so an external process\n\t// has to move the old binary out and the new one in then start the service\n\t// the easiest way to do this is with a batch file (or with a DLL, but that gets ugly for a cross compiled binary like cloudflared)\n\t// a batch file isn't ideal, but it is the simplest path forward for the constraints Windows creates\n\tif runtime.GOOS == \"windows\" {\n\t\tif err := writeBatchFile(v.targetPath, newFilePath, oldFilePath); err != nil {\n\t\t\treturn err\n\t\t}\n\t\trootDir := filepath.Dir(v.targetPath)","sourceCodeStart":89,"sourceCodeEnd":125,"githubUrl":"https://github.com/cloudflare/cloudflared/blob/2253eeeb25a44a713a4b60b8ba1e1b3f377d1a0f/cmd/cloudflared/updater/workers_update.go#L89-L125","documentation":"After checksum validation succeeds, Apply() compares the downloaded checksum with the checksum of the currently running binary (buildInfo.Checksum). If they match, there is no newer version to install; an error with this message is returned (and a Sentry event captured) because a no-op update is unexpected.","triggerScenarios":"The update service advertises a version whose binary checksum equals the running build — e.g. re-running update when already on the latest version, or a server-side publishing bug re-serving the current build as an upgrade.","commonSituations":"Cron/automation repeatedly invoking self-update while already up to date; a forced update attempt pinned to the same version; server misconfiguring the update manifest.","solutions":["No action needed — you are already running the target version","If an upgrade was expected, verify the service manifest/version with `cloudflared update` output or Cloudflare status","Update manually from official releases if the update channel is publishing stale artifacts","Remove redundant scheduled self-update jobs to avoid noise"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":"# skip self-update when already at latest\n$(@\"C:\\Program Files (x86)\\cloudflared\\cloudflared.exe\") update 2>&1 | Select-String \"checksum validation matches\" -Quiet\n# if true, exit the update job successfully — nothing to do","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Detect this message in automation and treat it as success (already up to date)","Don't schedule self-update more often than needed","If upgrades were expected, verify the update channel is publishing a genuinely new build"],"tags":["auto-update","checksum","no-op"],"backgroundTag":"checksum-mismatch","analyzedSha":"2253eeeb25a44a713a4b60b8ba1e1b3f377d1a0f","analyzedAt":"2026-09-06T04:14:33.757Z","contentChangedAt":"2026-09-06T04:14:33.757Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}