Enum TaskError 

#[non_exhaustive]
pub enum TaskError {
    Timeout {
        timeout: Duration,
    },
    Fatal {
        error: String,
    },
    Fail {
        error: String,
    },
    Canceled,
}

Errors produced by task execution.

These represent failures of individual async tasks managed by the runtime. Some errors are retryable (Timeout, Fail), others are considered fatal.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Timeout

Task execution exceeded its timeout duration.

Fields

timeout: Duration

Fatal

Non-recoverable fatal error (should not be retried).

Fields

error: String

Fail

Task execution failed but may succeed if retried.

Fields

error: String

Canceled

Task was cancelled due to shutdown or parent cancellation.

Returned when task detects CancellationToken::is_cancelled() and exits gracefully. This is not an error in traditional sense, but signals intentional termination.

Implementations

impl TaskError

pub fn as_label(&self) -> &'static str

Returns a short stable label (snake_case) for use in logs/metrics.

pub fn as_message(&self) -> String

Returns a human-readable message with details about the error.

pub fn is_retryable(&self) -> bool

Indicates whether the error type is safe to retry.

Trait Implementations

impl Debug for TaskError

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

Formats the value using the given formatter.

impl Display for TaskError

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

Formats the value using the given formatter.

impl Error for TaskError

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.