risingwavelabs/risingwave · error · MetaError

System parameters error: {0}

Error message

System parameters error: {0}

What it means

A system parameter (cluster-level configuration stored in meta, e.g. barrier_interval_ms, s3 settings) could not be read or applied. The String explains the problem. Raised by the system-params management code paths.

Source

Thrown at src/meta/src/error.rs:100

    #[error("{0} named {1} already exists{under_creation}", under_creation = (.2).map(|_| " and is still being created").unwrap_or(""))]
    Duplicated(
        &'static str,
        String,
        // if under creation, take streaming job id, otherwise None
        Option<JobId>,
    ),

    #[error("Service unavailable: {0}")]
    Unavailable(#[message] String),

    #[error("Election failed: {0}")]
    Election(#[source] BoxedError),

    #[error("Cancelled: {0}")]
    Cancelled(String),

    #[error("System parameters error: {0}")]
    SystemParams(String),

    #[error("Session parameters error: {0}")]
    SessionConfig(
        #[from]
        #[backtrace]
        SessionConfigError,
    ),

    #[error(transparent)]
    Connector(
        #[from]
        #[backtrace]
        ConnectorError,
    ),

    #[error("Sink error: {0}")]
    Sink(

View on GitHub (pinned to 6469eb736d)

Solutions

1. Read the message to identify the offending parameter.
2. Use `SHOW PARAMETERS`/risectl to inspect current valid system params and their ranges.
3. Reset the parameter to its default (`ALTER SYSTEM RESET`) and reapply a valid value.
4. If params are corrupted in the meta store, restore or manually fix the param entry, then restart meta.

Example fix

// before
ALTER SYSTEM SET barrier_interval_ms = 'abc'; -- SystemParams error
// after
ALTER SYSTEM SET barrier_interval_ms = 1000;

fn valid_barrier_interval(v: &str) -> bool {
    v.parse::<u64>().map(|n| n > 0).unwrap_or(false)
}

match meta_result {
    Err(MetaError::SystemParams(msg)) => { /* show valid params, reset to default */ }
    other => other?,
}

When it happens

Trigger: `ALTER SYSTEM SET` with an invalid value, failing to load/persist system params at startup, param value failing deserialization or range validation.

Common situations: Typo'd or out-of-range values in ALTER SYSTEM, manually editing meta storage and corrupting a param, version upgrade where a param's allowed type/range changed.

Understand the failure class

Background: "Invalid value" and "allowed values are" config errors: what your library rejected and how to fix it — this error's family across 41 libraries.

Related errors

• env variable `RW_META_ADDR` not found. For `./risedev d` us
• Session parameters error: {0}
• Unknown source connector: {connector_name}
• Field '{field}' is not allowed to be altered on the fly for
• Unknown connection: {connection_name}

AI-assisted analysis of risingwavelabs/risingwave@6469eb736d (2026-09-11). Data as JSON: /api/errors/c04bacc0d9aea028. Report an issue: GitHub.