Enum EngineError 

pub enum EngineError {
    Invalid(ValidationError),
    UnknownModel(String),
    Unsupported {
        backend: String,
        message: String,
    },
    Overloaded {
        backend: String,
        retry_after_ms: u64,
    },
    DeadlineExceeded {
        backend: String,
        timeout_ms: u64,
    },
    BackendValidation {
        backend: String,
        source: ValidationError,
    },
    Backend {
        backend: String,
        message: String,
    },
}

Errors that can occur during engine execution or model dispatch.

These errors are translated into corresponding HTTP/gRPC status codes by the API layer.

Variants

Invalid(ValidationError)

Request body failed schema validation. Mapped to HTTP 422 Unprocessable Entity.

UnknownModel(String)

Requested model alias is not registered. Mapped to HTTP 404 Not Found.

Unsupported

Request is valid Jev but unsupported by the selected backend profile. Mapped to HTTP 422.

Fields

backend: String

Identifier of the selected backend.

message: String

Contract limitation that rejected the request.

Overloaded

Backend admission queue is full. Mapped to HTTP 529 / gRPC unavailable.

Fields

backend: String

Identifier of the selected backend.

retry_after_ms: u64

Suggested caller backoff.

DeadlineExceeded

Queue-inclusive evaluation deadline elapsed. Mapped to HTTP 504 / gRPC deadline exceeded.

Fields

backend: String

Identifier of the selected backend.

timeout_ms: u64

Configured end-to-end queue and execution budget.

BackendValidation

Backend returned an answer that violates the request contract. Mapped to HTTP 500.

Fields

backend: String

Identifier of the failing backend.

source: ValidationError

Original request-bound validation failure.

Backend

Underlying backend driver encountered an internal execution failure. Mapped to HTTP 500.

Fields

backend: String

Identifier of the failing backend.

message: String

Descriptive failure message.

Trait Implementations

impl Debug for EngineError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for EngineError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for EngineError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ValidationError> for EngineError

fn from(source: ValidationError) -> Self

Converts to this type from the input type.