Struct UnknownProducerIdError 

pub struct UnknownProducerIdError { /* private fields */ }

This exception is raised by the broker if it could not locate the producer metadata associated with the producerId in question. This could happen if, for instance, the producer’s records were deleted because their retention time had elapsed. Once the last records of the producerId are removed, the producer’s metadata is removed from the broker, and future appends by the producer will return this exception.

Corresponds to Java’s UnknownProducerIdException, error code Errors::UnknownProducerId.

Java extends chain: UnknownProducerIdException -> OutOfOrderSequenceException -> ApiException -> KafkaException

Implementations

impl UnknownProducerIdError

pub fn new(message: impl Into<String>) -> Self

Create the error with the given message and no cause, mirroring Java’s (String message) constructor.

This keeps the plain name under CLAUDE.md §2: the dominant Java shape among the classes this macro declares is (String message) + (String message, Throwable cause), whose parameter-name intersection is {message} — matched exactly by (String message).

pub fn with_source(message: impl Into<String>, source: Error) -> Self

Create the error with the given message and an underlying cause, mirroring Java’s (String message, Throwable cause) constructor.

Suffixed with the one parameter beyond the {message} intersection (CLAUDE.md §2) — see new.

pub fn with_default_message() -> Self

Create the error with the default message for its error code, mirroring Java’s Errors.exception().

Not a constructor overload, so CLAUDE.md §2’s suffixing does not apply: it translates the Errors static factory, which fills in Errors.message() and has no Java constructor counterpart.

pub fn message(&self) -> &str

The error message.

pub fn source(&self) -> Option<&Error>

The underlying cause, if any. Mirrors Java’s getCause().

Trait Implementations

impl Clone for UnknownProducerIdError

fn clone(&self) -> UnknownProducerIdError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UnknownProducerIdError

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

Formats the value using the given formatter.

impl Display for UnknownProducerIdError

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

Formats the value using the given formatter.

impl Error for UnknownProducerIdError

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.