Enum ParticipantLogMigrationError 

pub enum ParticipantLogMigrationError {
    Configuration(String),
    Registry(String),
    Replay {
        conversation_id: u64,
        reason: String,
    },
    Write {
        conversation_id: u64,
        generation: u64,
        reason: String,
    },
    GenerationDrift {
        conversation_id: u64,
        generation: u64,
        sequence: u64,
    },
    StateDrift {
        conversation_id: u64,
        source_generation: u64,
        generation: u64,
    },
    Switch {
        conversation_id: u64,
        expected: u64,
        to: u64,
        reason: String,
    },
    SwitchUnconfirmed {
        conversation_id: u64,
        expected: u64,
        to: u64,
        reason: String,
    },
}

Why the migration stopped. Every refusal names the conversation, and no conversation’s authoritative generation is changed by a refused run.

Variants

Configuration(String)

The participant configuration’s outbox limits are invalid.

Registry(String)

The conversation registry could not be read.

Replay

A conversation’s log did not replay, so its rows cannot be rewritten.

Fields

conversation_id: u64

The conversation.

reason: String

The replay’s refusal.

Write

A conversation’s new generation could not be read or written.

Fields

conversation_id: u64

The conversation.

generation: u64

The generation being written.

reason: String

The store’s refusal.

GenerationDrift

A new generation left by an earlier run holds a row that differs from the row this run derives at the same sequence, or more rows than the log has.

Fields

conversation_id: u64

The conversation.

generation: u64

The generation holding the stray row.

sequence: u64

The first sequence that differs.

StateDrift

The rewritten generation replays to a different state than the log it was rewritten from.

Fields

conversation_id: u64

The conversation.

source_generation: u64

The generation it was rewritten from.

generation: u64

The rewritten generation.

Switch

The generation key moved while the migration ran, so another writer is using the store.

Fields

conversation_id: u64

The conversation.

expected: u64

The generation the migration read.

to: u64

The generation the migration wrote.

reason: String

The store’s refusal.

SwitchUnconfirmed

The authoritative generation was swapped but the flush that makes the swap durable failed, so which generation a restart finds is not known. Both generations replay to the same state; running the migration again reads the authoritative generation and reports or completes the conversation.

Fields

conversation_id: u64

The conversation.

expected: u64

The generation the migration read.

to: u64

The generation the migration wrote.

reason: String

The store’s refusal.

Trait Implementations

impl Debug for ParticipantLogMigrationError

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

Formats the value using the given formatter.

impl Display for ParticipantLogMigrationError

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

Formats the value using the given formatter.

impl Error for ParticipantLogMigrationError

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<ParticipantLogMigrationError> for ServerError

fn from(source: ParticipantLogMigrationError) -> Self

Converts to this type from the input type.