influxdata/influxdb · error · Error

deserialize error

Error message

deserialize error: {0}

What it means

Error::Serialize in influxdb3_wal wraps crate::serialize::Error (via #[from]) and is reported as "deserialize error" — it surfaces failures deserializing WAL entries, e.g. when reading/replaying WAL buffers or persisted WAL files whose payload cannot be decoded.

Solutions

1. Identify and truncate/quarantine the corrupt WAL segment, then restart so replay skips it
2. Ensure the software version matches the WAL files' writer version before replay
3. Check the inner serialize::Error for the exact decode failure and fix the producer

match result {
    Ok(v) => v,
    Err(Error::Serialize(src)) => { log::error!("WAL entry decode failed: {}", src); /* quarantine corrupt segment */ },
    Err(e) => return Err(e),
}

When it happens

Trigger: Deserializing a WAL operation from its serialized form (flatbuffers/protobuf payload) during buffer read or WAL replay when the bytes are corrupt, truncated, or produced by an incompatible serializer version.

Common situations: Crash/corruption leaving a partial WAL record on disk, version skew after an upgrade replaying old WAL files, hand-crafted or bit-flipped buffer payloads.

Understand the failure class

Background: "cannot parse invalid wire-format data", "cannot unmarshal", "failed unmarshalling": protobuf unmarshal errors explained — this error's family across 10 libraries.

Related errors

• bitcode error
• crc32 checksum mismatch
• Invalid wal file identifier
• try from slice error
• WAL file too small: expected at least

AI-assisted analysis of influxdata/influxdb@06200ef96b (2026-09-19). Data as JSON: /api/errors/67dd16512b92cac8. Report an issue: GitHub.

Appendix: source

Thrown at influxdb3_wal/src/lib.rs:43

use std::cmp::Ordering;
use std::fmt::Debug;
use std::hash::BuildHasherDefault;
use std::str::FromStr;
use std::sync::Arc;
use std::time::Duration;
use std::{any::Any, num::ParseIntError};
use thiserror::Error;
use tokio::sync::{OwnedSemaphorePermit, oneshot};

#[derive(Debug, Error)]
pub enum Error {
    #[error("wal buffer full with {0} ops")]
    BufferFull(usize),

    #[error("error writing wal file: {0}")]
    WriteError(String),

    #[error("deserialize error: {0}")]
    Serialize(#[from] crate::serialize::Error),

    #[error("join error: {0}")]
    Join(#[from] tokio::task::JoinError),

    #[error("object store error: {0}")]
    ObjectStoreError(#[from] ::object_store::Error),

    #[error("wal is shutdown and not accepting writes")]
    Shutdown,

    #[error("invalid gen1 duration {0}. Must be one of 1m, 5m, 10m")]
    InvalidGen1Duration(String),

    #[error("invalid WAL file path")]
    InvalidWalFilePath,
}

View on GitHub (pinned to 06200ef96b)