influxdata/influxdb · error · Error::NoHandler

not found

Error message

not found

What it means

This is the `Error::NoHandler` variant of the HTTP error enum in influxdb3_server. It means the HTTP server received a request whose path (and method) has no registered handler in the router. The library throws it when routing fails before any endpoint logic runs.

Solutions

1. Check the request path against the server's registered routes (see the router setup in influxdb3_server/src/http.rs) and fix typos
2. Verify you are running a build/feature flags that enable the endpoint you call
3. Check that the HTTP port points at the InfluxDB 3 HTTP service, not another component
4. Upgrade to a version that supports the endpoint if it is a newer API

Example fix

// before
curl -X POST http://localhost:8181/api/v3/write_lps?db=mydb ...
// after
curl -X POST http://localhost:8181/api/v3/write_lp?db=mydb ...

const ROUTES = ['/api/v3/write_lp','/api/v3/query','/health'];
if (!ROUTES.includes(new URL(url).pathname)) throw new Error('unregistered path: ' + url);

function hasKnownPath(url) { return ROUTES.includes(new URL(url).pathname); }

When it happens

Trigger: Sending an HTTP request to a path that is not registered in the server's router, e.g. a typo'd endpoint, an API that is disabled by a feature flag, or hitting a v1/v2 compatibility path that is not enabled.

Common situations: Typos in the URL path (e.g. /write vs /api/v3/write_lp), calling an endpoint added in a newer InfluxDB 3 version while running an older build, querying a disabled module (query vs write server), or wrong port where a different service listens.

Understand the failure class

Background: 'Could not be found', 'does not exist', 'not found in database': the resource-not-found family when an ID, slug, key, or URI lookup comes back empty — this error's family across 20 libraries.

Related errors

• {error_code}
• arrow error
• Authorization header was malformed, the request was not in…
• body content is not valid utf8
• Cannot parse the given human time

AI-assisted analysis of influxdata/influxdb@06200ef96b (2026-09-19). Data as JSON: /api/errors/9771fd237306e0ca. Report an issue: GitHub.

Appendix: source

Thrown at influxdb3_server/src/http.rs:196

    }
}

impl From<AuthenticationError> for RoutingError {
    fn from(e: AuthenticationError) -> Self {
        Self::Authentication(e)
    }
}

impl From<ResourceAuthorizationError> for RoutingError {
    fn from(e: ResourceAuthorizationError) -> Self {
        Self::Authorization(e)
    }
}

#[derive(Debug, Error)]
pub enum Error {
    /// The requested path has no registered handler.
    #[error("not found")]
    NoHandler,

    /// The request body content is not valid utf8.
    #[error("body content is not valid utf8: {0}")]
    NonUtf8Body(Utf8Error),

    /// The `Content-Encoding` header is invalid and cannot be read.
    #[error("invalid content-encoding header: {0}")]
    NonUtf8ContentEncodingHeader(hyper::header::ToStrError),

    /// The `Content-Type` header is invalid and cannot be read.
    #[error("invalid content-type header: {0}")]
    NonUtf8ContentTypeHeader(hyper::header::ToStrError),

    /// The specified `Content-Encoding` is not acceptable.
    #[error("unacceptable content-encoding: {0}")]
    InvalidContentEncoding(String),

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