openai/codex · error · anyhow::Error

MCP client cannot recover before initialize succeeds

Error message

MCP client cannot recover before initialize succeeds

What it means

Error "MCP client cannot recover before initialize succeeds" thrown in openai/codex.

Source

Thrown at codex-rs/rmcp-client/src/rmcp_client.rs:1453

                ClientState::Ready { service, .. } if !Arc::ptr_eq(service, failed_service) => {
                    return Ok(());
                }
                ClientState::Ready { .. } => {}
                ClientState::Connecting { .. } => {
                    return Err(anyhow!("MCP client not initialized"));
                }
                ClientState::Closed => {
                    return Err(anyhow!("MCP client is shut down"));
                }
            }
        }

        let initialize_context = self
            .initialize_context
            .lock()
            .await
            .clone()
            .ok_or_else(|| anyhow!("MCP client cannot recover before initialize succeeds"))?;
        let pending_transport = Self::create_pending_transport(&self.transport_recipe).await?;
        let (service, oauth_persistor) = self
            .connect_pending_transport_with_initialize_retries(
                pending_transport,
                initialize_context.client_service,
                initialize_context.timeout,
            )
            .await?;
        service
            .peer()
            .peer_info()
            .ok_or_else(|| anyhow!("recovered handshake succeeded but server info was missing"))?;

        {
            let mut guard = self.state.lock().await;
            if matches!(*guard, ClientState::Closed) {
                return Err(anyhow!("MCP client is shut down"));
            }

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/rmcp-client/src/rmcp_client.rs:1453 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/60a0446447240ac3. Report an issue: GitHub.