Enum LifecycleGroupError 

pub enum LifecycleGroupError {
    InvalidConfig(String),
    StartFailed {
        index: u8,
        error: LifecycleError,
    },
    PlacementFailed {
        index: u8,
        reason: String,
    },
}

Group-spawn failure shape. Distinguishes config-time errors (rejected on the caller side before any on_start fires) from per-replica on_start failures (carry the failing index for operator diagnosis) and from placement failures (no candidate node satisfied the daemon’s capability requirements + spread constraint).

Variants

InvalidConfig(String)

replica_count == 0 or other up-front validation rejected the spawn.

StartFailed

A specific replica’s on_start failed. The other already-started replicas drop cleanly via their handles’ Drop impl when the partially-built group goes out of scope.

Fields

index: u8

Index of the replica whose on_start failed.

error: LifecycleError

The underlying lifecycle error.

PlacementFailed

Scheduler::place_with_spread could not find a candidate node satisfying the daemon’s CapabilityFilter outside the already-used set (spread invariant).

Fields

index: u8

Index of the replica that could not be placed.

reason: String

Operator-facing diagnostic string.

Trait Implementations

impl Debug for LifecycleGroupError

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

Formats the value using the given formatter.

impl Display for LifecycleGroupError

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

Formats the value using the given formatter.

impl Error for LifecycleGroupError

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.