influxdata/influxdb · error · ProcessingEngineError

write buffer error

Error message

write buffer error: {0}

What it means

ProcessingEngineError::WriteBufferError with #[from] influxdb3_write::write_buffer::Error — automatic conversion of write-buffer failures. It surfaces when a processing-engine operation interacts with the write buffer (e.g. WAL-replayed trigger setup or writes routed through the buffer) and that layer fails.

Solutions

1. Read the inner write_buffer::Error to find the root cause (missing db/table vs IO).
2. Ensure the database and measurement/table referenced by the trigger exist.
3. Retry after the write buffer is healthy if the cause was transient (disk, lock).
4. Upgrade/verify influxdb3_write compatibility if the error indicates an unsupported operation.

await assertDbAndTableExist(dbName, tableName); // check via SHOW DATABASES / SHOW TABLES first

try {
  await setupTrigger(trigger);
} catch (e) {
  if (String(e).startsWith('write buffer error')) {
    logRootCause(e); // parse inner influxdb3_write error
  } else { throw e; }
}

When it happens

Trigger: Operations that resolve or write through the WriteBuffer while setting up/running triggers, when influxdb3_write::write_buffer::Error is returned (unknown database/table, invalid write, buffer closed).

Common situations: Trigger configured against a table that doesn't exist; write buffer backend disk issues; calling processing-engine APIs before the write buffer is fully initialized.

Related errors

• catalog update error
• plugin error
• wal error
• {0}
• authorization failure

AI-assisted analysis of influxdata/influxdb@06200ef96b (2026-09-19). Data as JSON: /api/errors/15aa9f0efa2c23a0. Report an issue: GitHub.

Appendix: source

Thrown at influxdb3_processing_engine/src/manager.rs:15

use crate::environment::PluginEnvironmentError;
use influxdb3_catalog::CatalogError;
use influxdb3_id::{DbId, TriggerId};
use std::fmt::Debug;
use thiserror::Error;

#[derive(Debug, Error)]
pub enum ProcessingEngineError {
    #[error("database not found: {0}")]
    DatabaseNotFound(String),

    #[error("catalog update error: {0}")]
    CatalogUpdateError(#[from] CatalogError),

    #[error("write buffer error: {0}")]
    WriteBufferError(#[from] influxdb3_write::write_buffer::Error),

    #[error("wal error: {0}")]
    WalError(#[from] influxdb3_wal::Error),

    #[error("plugin error: {0}")]
    PluginError(#[from] crate::plugins::PluginError),

    #[error("processing engine trigger {trigger_id} not found in database {db_id}")]
    TriggerNotFound { db_id: DbId, trigger_id: TriggerId },

    #[error("request trigger not found")]
    RequestTriggerNotFound,

    #[error("request handler for trigger down")]
    RequestHandlerDown,

    #[error("error installing python packages: {0}")]

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