influxdata/influxdb · error · ProcessingEngineError

request handler for trigger down

Error message

request handler for trigger down

What it means

ProcessingEngineError::RequestHandlerDown, raised when the request trigger exists but its handler task is not running — the handler was shut down, crashed, or never started, so requests cannot be served.

Solutions

1. Check node logs for handler task panics or shutdowns
2. Restart the processing engine trigger to bring the handler back up
3. Return 503 to indicate the backing handler is temporarily unavailable

When it happens

Trigger: Thrown at influxdb3_processing_engine/src/manager.rs:30 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of influxdata/influxdb@06200ef96b (2026-09-19). Data as JSON: /api/errors/69bacc52e2f15401. Report an issue: GitHub.

Appendix: source

Thrown at influxdb3_processing_engine/src/manager.rs:30

    #[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}")]
    PythonPackageError(PluginEnvironmentError),

    #[error("{0}")]
    PackageInstallationDisabled(PluginEnvironmentError),
}

impl From<PluginEnvironmentError> for ProcessingEngineError {
    fn from(err: PluginEnvironmentError) -> Self {
        match err {
            PluginEnvironmentError::PackageInstallationDisabled => {
                ProcessingEngineError::PackageInstallationDisabled(err)
            }
            other => ProcessingEngineError::PythonPackageError(other),
        }
    }

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