Enum ProposeError 

#[non_exhaustive]
pub enum ProposeError {
    NotLeader {
        leader_hint: NodeId,
    },
    NoLeader,
    Shutdown,
    DriverDead,
    Busy,
    Fatal {
        reason: &'static str,
    },
}

Errors propose / add_peer / remove_peer can return.

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.

NotLeader

We were a follower with a known leader; redirect there.

Fields

leader_hint: NodeId

NoLeader

We were a follower or candidate with no known leader. The caller should retry on a sensible cadence; the cluster may still be electing.

Shutdown

The runtime is shutting down.

DriverDead

The driver task died. Likely a bug or a fatal Storage / StateMachine error.

Busy

The driver’s in-flight proposal queue is full (Config::max_pending_proposals reached). Backpressure signal: retry later, or adjust the limit upward if your workload’s concurrency is legitimately that high.

Fatal

A non-recoverable error hit the runtime: a Storage write failed, the state machine couldn’t decode a committed command (corrupt log), or similar. The driver has shut itself down after failing every in-flight proposal with this error — the caller’s next call will see Shutdown or DriverDead.

Fields

reason: &'static str

Trait Implementations

impl Debug for ProposeError

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

Formats the value using the given formatter.

impl Display for ProposeError

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

Formats the value using the given formatter.

impl Error for ProposeError

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.