Enum SessionError 

pub enum SessionError {
    ClientDisconnect(Error),
    Backend(Error),
}

Session-level error that carries the client-disconnect signal through the handler stack.

Only two cases matter for control flow:

• ClientDisconnect — client closed connection; don’t log, don’t retry, propagate cleanly
• Backend — log, maybe retry, handle as backend/protocol error

Variants

ClientDisconnect(Error)

Client disconnected (BrokenPipe, ConnectionReset).

Not a real error — normal operation. Should not be logged as a warning.

Backend(Error)

Any other error (backend I/O, protocol, timeout, pool exhaustion, etc.)

Trait Implementations

impl Debug for SessionError

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

Formats the value using the given formatter.

impl Display for SessionError

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

Formats the value using the given formatter.

impl Error for SessionError

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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.

impl From<Error> for SessionError

Convert anyhow::Error into SessionError, classifying client disconnects.

Tries to downcast to io::Error (most common) and then to ConnectionError. Disconnect kinds (BrokenPipe, ConnectionReset) become ClientDisconnect. Everything else becomes Backend.

fn from(e: Error) -> Self

Converts to this type from the input type.