ruvnet/ruflo · error · Error

ruflo proxy supervisor failed to spawn — no PID returned

Error message

ruflo proxy supervisor failed to spawn — no PID returned

What it means

Error "ruflo proxy supervisor failed to spawn — no PID returned" thrown in ruvnet/ruflo.

Source

Thrown at v3/@claude-flow/cli/src/proxy/lifecycle.ts:230

  const lockFd = acquireStartLock();
  try {
    // Re-check under the lock — the dedup above raced a concurrent starter.
    const rechecked = getProxyStatus();
    if (rechecked.running && rechecked.pid) throw new ProxyAlreadyRunningError(rechecked.pid);
    if (rechecked.stalePidFile) clearStalePidFile();

    const logFd = fs.openSync(proxyLogFilePath(), 'a');
    const cliEntry = process.argv[1];
    if (!cliEntry) throw new Error('cannot locate the ruflo CLI entrypoint for supervised service mode');
    const child = spawn(process.execPath, [cliEntry, 'proxy', 'supervise'], {
      stdio: ['ignore', logFd, logFd],
      detached: true,
      windowsHide: true,
    });
    fs.closeSync(logFd); // the child holds its own duplicated fd; safe to close ours

    if (!child.pid) throw new Error('ruflo proxy supervisor failed to spawn — no PID returned');
    writePidFile(child.pid);
    child.unref();
    return { pid: child.pid };
  } finally {
    releaseStartLock(lockFd);
  }
}

export interface StopResult {
  wasRunning: boolean;
  pid: number | null;
}

/** SIGTERM -> 1000ms -> SIGKILL if still alive, mirroring daemon.ts's killBackgroundDaemon. */
export async function stopProxy(): Promise<StopResult> {
  const status = getProxyStatus();
  if (!status.running || !status.pid) {
    if (status.stalePidFile) clearStalePidFile();

View on GitHub (pinned to 6b01dc5a68)

When it happens

Trigger: Thrown at v3/@claude-flow/cli/src/proxy/lifecycle.ts:230 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruvnet/ruflo@6b01dc5a68 (2026-08-12). Data as JSON: /api/errors/fddff29200b7482e. Report an issue: GitHub.