Enum TransitionRejection 

pub enum TransitionRejection {
    UnknownRange {
        collection: CollectionId,
        range_id: RangeId,
    },
    OwnerMismatch {
        collection: CollectionId,
        range_id: RangeId,
        expected: NodeIdentity,
        current: NodeIdentity,
    },
    StaleEpoch {
        collection: CollectionId,
        range_id: RangeId,
        expected: OwnershipEpoch,
        current: OwnershipEpoch,
    },
    StaleCatalogVersion {
        collection: CollectionId,
        range_id: RangeId,
        expected: CatalogVersion,
        current: CatalogVersion,
    },
    InvalidCandidate {
        collection: CollectionId,
        range_id: RangeId,
        candidate: NodeIdentity,
        reason: InvalidCandidateReason,
    },
    MissingSafetyEvidence {
        collection: CollectionId,
        range_id: RangeId,
        candidate: NodeIdentity,
    },
    EvidenceForWrongCandidate {
        collection: CollectionId,
        range_id: RangeId,
        target: NodeIdentity,
        evidence_for: NodeIdentity,
    },
    SafetyCheckFailed {
        collection: CollectionId,
        range_id: RangeId,
        candidate: NodeIdentity,
        watermark: CommitWatermark,
        applied_term: u64,
        applied_lsn: u64,
    },
}

Why an ownership transition was refused. Every variant leaves the catalog untouched — transitions fail closed.

Variants

UnknownRange

No range with this (collection, range_id) exists in the catalog.

Fields

collection: CollectionId

range_id: RangeId

OwnerMismatch

The request’s expected current owner does not match the catalog. The planner is working from a stale view of who owns the range.

Fields

collection: CollectionId

range_id: RangeId

expected: NodeIdentity

current: NodeIdentity

StaleEpoch

The request’s expected ownership epoch does not match the catalog — authority has already moved since the planner read it.

Fields

collection: CollectionId

range_id: RangeId

expected: OwnershipEpoch

current: OwnershipEpoch

StaleCatalogVersion

The request’s expected catalog version does not match the catalog — the entry has been edited since the planner read it (CAS failure).

Fields

collection: CollectionId

range_id: RangeId

expected: CatalogVersion

current: CatalogVersion

InvalidCandidate

The target candidate is not eligible to take ownership.

Fields

collection: CollectionId

range_id: RangeId

candidate: NodeIdentity

reason: InvalidCandidateReason

MissingSafetyEvidence

No safety evidence was supplied for the candidate, so the safety gate cannot be evaluated — fail closed.

Fields

collection: CollectionId

range_id: RangeId

candidate: NodeIdentity

EvidenceForWrongCandidate

Safety evidence was supplied but describes a different node than the target — it cannot vouch for the candidate being promoted.

Fields

collection: CollectionId

range_id: RangeId

target: NodeIdentity

evidence_for: NodeIdentity

SafetyCheckFailed

The candidate’s applied log does not cover the range commit watermark — promoting it could lose committed writes, so the transition is refused.

Fields

collection: CollectionId

range_id: RangeId

candidate: NodeIdentity

watermark: CommitWatermark

applied_term: u64

applied_lsn: u64

Trait Implementations

impl Clone for TransitionRejection

fn clone(&self) -> TransitionRejection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TransitionRejection

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

Formats the value using the given formatter.

impl Display for TransitionRejection

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

Formats the value using the given formatter.

impl Eq for TransitionRejection

impl Error for TransitionRejection

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<TransitionRejection> for TransitionError

fn from(value: TransitionRejection) -> TransitionError

Converts to this type from the input type.

impl PartialEq for TransitionRejection

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TransitionRejection