# X_BENCH_STREAM_CLOSED

## Means

the restart benchmark's stdout closed before the line it was waiting for

## Typical cause

the shard or the server process ended without printing its `READY` or `FINAL ` line, so the orchestrator was reading a stream that could never answer — the measurement it was about to report was never taken

## Fix

`bun run scripts/bench/restart-bench.ts --clients 50000 --out scripts/bench/results/50k-restart.json`

[CLI and verify](/error-codes#cli-and-verify)