Enum FeatureActivationError 

pub enum FeatureActivationError {
    UnknownFeature {
        feature: String,
    },
    LevelBelowRequirement {
        feature: String,
        required: ClusterFeatureLevel,
        attempted: ClusterFeatureLevel,
    },
    LevelRegression {
        current: ClusterFeatureLevel,
        attempted: ClusterFeatureLevel,
    },
    UnsupportedByVoter {
        feature: String,
        node: NodeId,
    },
    NoVoters,
}

Why a FeatureActivation may not be applied. Activation failures fail closed (ADR-0010).

Serde derives exist so the meta group’s rejection journal (MetaRejection) can record the typed reason inside replicated state.

Variants

UnknownFeature

The feature is not declared in this binary’s registry.

Fields

feature: String

The feature that was to be activated.

LevelBelowRequirement

The activation level is below the feature’s registered minimum.

Fields

feature: String

The feature that was to be activated.

required: ClusterFeatureLevel

Registered minimum level for the feature.

attempted: ClusterFeatureLevel

Level the activation attempted.

LevelRegression

The activation would lower the cluster feature level; the level never regresses (ADR-0010: no in-place un-activate).

Fields

current: ClusterFeatureLevel

Current cluster feature level.

attempted: ClusterFeatureLevel

Level the activation attempted.

UnsupportedByVoter

A voter’s advertisement does not include the feature (spec section 11.8 step 5: enable new features only after every voter supports them).

Fields

feature: String

The feature that was to be activated.

node: NodeId

The first voter whose VersionInfo::feature_set lacks it.

NoVoters

Activation with no voters is meaningless; fail closed.

Trait Implementations

impl Clone for FeatureActivationError

fn clone(&self) -> FeatureActivationError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FeatureActivationError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FeatureActivationError

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for FeatureActivationError

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

Formats the value using the given formatter.

impl Eq for FeatureActivationError

impl Error for FeatureActivationError

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<FeatureActivationError> for MetaRejectionReason

fn from(source: FeatureActivationError) -> Self

Converts to this type from the input type.

impl PartialEq for FeatureActivationError

fn eq(&self, other: &FeatureActivationError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for FeatureActivationError

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FeatureActivationError