Struct ConnectionFault 

pub(crate) struct ConnectionFault {
    pub(crate) server: AtomicBool,
    pub(crate) in_server_work: AtomicBool,
}

Decides the status a connection reports to mz_balancer_connection_status.

A connection is an error when balancerd or its backend could not serve it: the connection limit refused it, a server-side step failed (resolving the backend, authenticating against Frontegg, connecting upstream), or the pre-resolved deadline expired during balancerd’s own work. Everything else is a success, including connections that reached proxying and connections the client ended or failed: hangups, protocol violations, rejected credentials, an SNI that is missing or names no tenant (UnknownHost), or stalling until the deadline.

A failed TLS handshake is a success too. balancerd cannot tell a client that rejects its certificate from one that cannot speak TLS, so those are counted on their own, in mz_balancer_tls_handshake_failures_total.

Every server-side failure has to be reported through ConnectionFault::server: a connection that is never marked is a success, whatever its handler returned.

Fields

server: AtomicBool

in_server_work: AtomicBool

Implementations

impl ConnectionFault

pub(crate) fn server(&self)

Records that balancerd or its backend failed the connection.

pub(crate) async fn server_work<F: Future>(&self, fut: F) -> F::Output

Marks fut as balancerd’s own work, so a pre-resolved deadline that fires while it is pending counts as a server fault.

NOTE: The flag is cleared only when fut completes. A deadline that drops this future leaves it set, which is what ConnectionFault::timed_out relies on.

pub(crate) fn timed_out(&self)

Records that the pre-resolved deadline expired. Only a deadline that interrupted ConnectionFault::server_work is a server fault.

pub(crate) fn is_ok(&self) -> bool

Trait Implementations

impl Debug for ConnectionFault

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

Formats the value using the given formatter.

impl Default for ConnectionFault

fn default() -> ConnectionFault

Returns the “default value” for a type.