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ResolveError

mz_balancerd

Enum ResolveError 

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pub(crate) enum ResolveError {
    InvalidPassword,
    Client(Error),
    Upstream(Error),
    Internal(Error),
}
Expand description

An error resolving a connection’s destination.

The Display of this error is sent to unauthenticated clients, so it must not contain internal details such as hostnames. Those belong in the source error attached to each variant, which is only logged.

Variants§

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InvalidPassword

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Client(Error)

A client protocol violation, e.g. sending the wrong message during startup. An unauthenticated client can trigger these at will, so they are logged at warn!, not error!, to avoid making client noise look like server faults and spamming the error log.

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Upstream(Error)

The tenant’s upstream backend could not be reached, e.g. its hostname did not resolve. Reported to the client with a distinct, non-leaking message rather than a generic internal error, so a down environment is not mistaken for a balancerd bug. Logged at warn!: a bogus SNI reaches this from an unauthenticated client, and a genuinely down environment is an operational condition, not a balancerd fault.

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Internal(Error)

A server-side fault.

Trait Implementations§

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impl Debug for ResolveError

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for ResolveError

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fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Error for ResolveError

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fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more
1.0.0 · Source§

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

Read more
1.0.0 · Source§

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type-based access to context intended for error reports. Read more
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impl From<Error> for ResolveError

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fn from(source: Error) -> Self

Converts to this type from the input type.
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impl From<Error> for ResolveError

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fn from(e: Error) -> Self

Converts to this type from the input type.

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