zed-industries/zed · error

Cannot send initialize request, task still building

Error message

Cannot send initialize request, task still building

What it means

request_initialize was called while the session state is still Booting — the adapter process/binary has not finished starting, so the initialize request cannot be sent yet. The session pipeline should retry once booting completes.

Source

Thrown at crates/project/src/debugger/session.rs:1275

                .update(cx, |session, cx| {
                    session.respond_to_client(
                        seq,
                        success,
                        RunInTerminal::COMMAND.to_string(),
                        body,
                        cx,
                    )
                })?
                .await
        })
    }

    pub(super) fn request_initialize(&mut self, cx: &mut Context<Self>) -> Task<Result<()>> {
        let adapter_id = self.adapter().to_string();
        let request = Initialize { adapter_id };

        let SessionState::Running(running) = &self.state else {
            return Task::ready(Err(anyhow!(
                "Cannot send initialize request, task still building"
            )));
        };
        let mut response = running.request(request.clone());

        cx.spawn(async move |this, cx| {
            loop {
                let capabilities = response.await;
                match capabilities {
                    Err(e) => {
                        let Ok(Some(reconnect)) = this.update(cx, |this, cx| {
                            this.as_running()
                                .and_then(|running| running.reconnect_for_ssh(&mut cx.to_async()))
                        }) else {
                            return Err(e);
                        };
                        log::info!("Failed to connect to debug adapter: {}, retrying...", e);
                        reconnect.await?;

View on GitHub (pinned to 9d272b0363)

Solutions

1. Wait for the boot/build to finish and re-issue the initialize request (the session retries automatically in the normal flow)
2. If it never leaves Booting, check the build task and adapter download for failures

When it happens

Trigger: Thrown at crates/project/src/debugger/session.rs:1275 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@9d272b0363 (2026-08-20). Data as JSON: /api/errors/2bce2f45da025f23. Report an issue: GitHub.