astral-sh/ruff · error · ruff_server::server::api::Error

-32601

-32601

Error message

Unknown request: {method}

What it means

Error "Unknown request: {method}" thrown in astral-sh/ruff.

Source

Thrown at crates/ruff_server/src/server/api.rs:74

        }
        request::DocumentDiagnostic::METHOD => {
            background_request_task::<request::DocumentDiagnostic>(req, BackgroundSchedule::Worker)
        }
        request::ExecuteCommand::METHOD => sync_request_task::<request::ExecuteCommand>(req),
        request::Format::METHOD => {
            background_request_task::<request::Format>(req, BackgroundSchedule::Fmt)
        }
        request::FormatRange::METHOD => {
            background_request_task::<request::FormatRange>(req, BackgroundSchedule::Fmt)
        }
        request::Hover::METHOD => {
            background_request_task::<request::Hover>(req, BackgroundSchedule::Worker)
        }
        lsp_types::ShutdownRequest::METHOD => sync_request_task::<requests::ShutdownHandler>(req),
        method => {
            tracing::warn!("Received request {method} which does not have a handler");
            let result: Result<()> = Err(Error::new(
                anyhow!("Unknown request: {method}"),
                server::ErrorCode::MethodNotFound,
            ));
            return Task::immediate(id, result);
        }
    }
    .unwrap_or_else(|err| {
        tracing::error!("Encountered error when routing request with ID {id}: {err}");

        Task::sync(move |_session, client| {
            client.show_error_message(
                "Ruff failed to handle a request from the editor. Check the logs for more details.",
            );
            respond_silent_error(
                id,
                client,
                lsp_server::ResponseError {
                    code: err.code as i32,
                    message: err.to_string(),

View on GitHub (pinned to 672bb4edf0)

When it happens

Trigger: Thrown at crates/ruff_server/src/server/api.rs:74 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of astral-sh/ruff@672bb4edf0 (2026-08-16). Data as JSON: /api/errors/4931fab12dc3b9ca. Report an issue: GitHub.