Enum EventStoreError 

pub enum EventStoreError {
    Backend(String),
    Corrupted(String),
    Disk(String),
    HashMismatch {
        seq: u64,
    },
    OutOfOrder {
        high_watermark: u64,
        seq: u64,
    },
    Closed,
    Gap {
        prev: u64,
        next: u64,
        missing: u64,
    },
    CrashedPredecessor,
}

Errors returned by event store backends, the writer, the reader, and the verifier.

The variants form a typed surface for the operational policies described in the SPEC: disk pressure halts the kernel, hash mismatch quarantines the affected run, and a crashed predecessor is sealed by the caller before a new run is opened.

Variants

Backend(String)

A backend operation failed for a reason that does not fit any other variant.

Typically wraps a redb error or an in-memory backend invariant violation.

Corrupted(String)

A run file is structurally damaged and cannot be opened safely.

Surfaces redb header-region corruption and any backend-detected structural failure.

Disk(String)

The backing storage refused the write because of disk pressure.

Maps to redb Io(FileTooLarge) and equivalent host-level failures (ENOSPC, RLIMIT_FSIZE). Triggers the kernel halt path; the writer fail-stops.

HashMismatch

The canonical entry hash recorded with a row does not match the recomputed hash.

Quarantines the affected run.

Fields

seq: u64

The sequence number whose stored hash did not match.

OutOfOrder

The writer received an entry whose sequence number is not contiguous after the current durable high-watermark.

Fields

high_watermark: u64

The current durable high-watermark.

seq: u64

The offending sequence number.

Closed

The run is sealed and cannot accept further writes.

Gap

A reader processing seq=N+1 did not observe seq=N.

One of the four idempotency primitives: gap detection on read.

Fields

prev: u64

The last seq the reader observed.

next: u64

The next seq the reader observed.

missing: u64

The first missing seq.

CrashedPredecessor

Opening a run found a predecessor whose status is Running and that lacks a RunEnded entry.

The kernel is expected to seal the predecessor (as CrashedRecovered, or Quarantined if hash check fails) and then open a new run that records the predecessor’s run_id as parent_run_id.

Trait Implementations

impl Debug for EventStoreError

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

Formats the value using the given formatter.

impl Display for EventStoreError

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

Formats the value using the given formatter.

impl Error for EventStoreError

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<EventStoreError> for BootError

fn from(source: EventStoreError) -> Self

Converts to this type from the input type.

impl From<EventStoreError> for CacheReplayError

fn from(source: EventStoreError) -> Self

Converts to this type from the input type.

impl From<EventStoreError> for ReplayInputError

fn from(source: EventStoreError) -> Self

Converts to this type from the input type.

impl From<EventStoreError> for VerifyError

fn from(source: EventStoreError) -> Self

Converts to this type from the input type.