openai/codex · error · std::io::Error

processor unavailable

Error message

processor unavailable

What it means

Error "processor unavailable" thrown in openai/codex.

Source

Thrown at codex-rs/app-server-transport/src/transport/stdio.rs:40

use tracing::info;

pub async fn start_stdio_connection(
    transport_event_tx: mpsc::Sender<TransportEvent>,
    stdio_handles: &mut Vec<JoinHandle<()>>,
    initialize_client_name_tx: oneshot::Sender<String>,
) -> IoResult<()> {
    let connection_id = next_connection_id();
    let (writer_tx, mut writer_rx) = mpsc::channel::<QueuedOutgoingMessage>(CHANNEL_CAPACITY);
    let writer_tx_for_reader = writer_tx.clone();
    transport_event_tx
        .send(TransportEvent::ConnectionOpened {
            connection_id,
            origin: ConnectionOrigin::Stdio,
            writer: writer_tx,
            disconnect_sender: None,
        })
        .await
        .map_err(|_| std::io::Error::new(ErrorKind::BrokenPipe, "processor unavailable"))?;

    let transport_event_tx_for_reader = transport_event_tx.clone();
    stdio_handles.push(tokio::spawn(async move {
        let stdin = io::stdin();
        let reader = BufReader::new(stdin);
        let mut lines = reader.lines();
        let mut initialize_client_name_tx = Some(initialize_client_name_tx);

        loop {
            match lines.next_line().await {
                Ok(Some(line)) => {
                    if let Some(client_name) = stdio_initialize_client_name(&line)
                        && let Some(initialize_client_name_tx) = initialize_client_name_tx.take()
                    {
                        let _ = initialize_client_name_tx.send(client_name);
                    }
                    if !forward_incoming_message(
                        &transport_event_tx_for_reader,

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/app-server-transport/src/transport/stdio.rs:40 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/a36cc016250f6228. Report an issue: GitHub.