Enum MigrationError 

pub enum MigrationError {
    DaemonNotFound(u64),
    TargetUnavailable(u64),
    NoTargetAvailable,
    StateFailed(String),
    AlreadyMigrating(u64),
    WrongPhase {
        expected: MigrationPhase,
        got: MigrationPhase,
    },
    SnapshotTooLarge {
        size: usize,
        max: usize,
    },
    BufferFull {
        events: usize,
        bytes: usize,
    },
    WrongPeer {
        daemon_origin: u64,
        from: u64,
        expected: u64,
    },
}

Errors from migration operations.

Variants

DaemonNotFound(u64)

Daemon not registered locally.

TargetUnavailable(u64)

Target node unreachable or refused.

NoTargetAvailable

Auto-placement found no candidate node satisfying the daemon’s capability requirements. Distinct from TargetUnavailable(_) which carries a specific failed target — auto-placement never has one to report. Pre-fix the auto path constructed TargetUnavailable(0), surfacing “target node 0x0 unavailable” to operators when no specific node had ever been tried.

StateFailed(String)

Snapshot/restore failure.

AlreadyMigrating(u64)

Migration already in progress for this daemon.

WrongPhase

Attempted to advance from wrong phase.

Fields

expected: MigrationPhase

Expected phase.

got: MigrationPhase

Actual phase.

SnapshotTooLarge

Snapshot exceeds the maximum transferable size.

Fields

size: usize

Actual size in bytes.

max: usize

Maximum allowed size in bytes.

BufferFull

Wire-driven event-buffering surface refused an insert because the per-daemon out-of-order pending buffer is at its byte or event-count cap. Source must back off; the migration is not failed but the offending event was not accepted.

Fields

events: usize

Current buffered event count.

bytes: usize

Current buffered byte total (sum of payload lengths).

WrongPeer

Inbound migration message arrived from a peer that is not the recorded principal for this migration’s role. The wire layer authenticates the session; this layer authenticates that the authenticated peer is actually a participant in the recorded migration (source / target / orchestrator). Mismatches are silently dropped at the dispatch boundary rather than acted on.

Fields

daemon_origin: u64

The daemon-origin the migration is keyed on.

from: u64

The peer that delivered the message.

expected: u64

The principal recorded for this role.

Trait Implementations

impl Clone for MigrationError

fn clone(&self) -> MigrationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MigrationError

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

Formats the value using the given formatter.

impl Display for MigrationError

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

Formats the value using the given formatter.

impl Eq for MigrationError

impl Error for MigrationError

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<MigrationError> for DaemonError

fn from(source: MigrationError) -> Self

Converts to this type from the input type.

impl PartialEq for MigrationError

fn eq(&self, other: &MigrationError) -> 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 MigrationError