Error Handling

All errors received by Kuzzle clients are KuzzleError error objects.

A KuzzleError object has the following properties:

number

string

string

string

number

Clients can detect the error type based on the status and process the error accordingly.

id

The id property is a concatenation of 3 levels of precisions, telling what kind of error it is.

For instance, the error api.assert.missing_argument is triggered because an API assertion, indicating that a received request is malformed.

You can see the full definition about Kuzzle errors here

code

The code property is a concatenation of 3 codes:

• The domain code (eg. 02 for api).
• The subdomain code (eg. 04 for auth).
• The proper error code (eg. 0001 for database_not_found).

So a code 0x02040001 has 02 as domain code on 1 byte, 04 as subdomain code on 1 byte and 0001 as error code on 2 bytes.

The full list of Kuzzle API errors is available here.

Common errors

All Kuzzle requests can return one of the following errors:

BadRequestError

status: 400

A BadRequestError error is thrown if Kuzzle was unable to process the action due to a malformed request, or if required parameters are missing.

ExternalServiceError

status: 500

An ExternalServiceError error is thrown if Kuzzle was unable to process the action due to an external service failure (e.g. database down).

ForbiddenError

status: 403

A ForbiddenError error is thrown if the current authenticated user is not authorized to perform the requested action.

GatewayTimeoutError

status: 504

A GatewayTimeoutError error is thrown if Kuzzle, or a plugin, takes too long to respond.

Receiving this error does not guarantee the original request was not processed, just that it was not processed in time.

The Client Application will have to determine if the process was completed.

InternalError

status: 500

An InternalError error is thrown if Kuzzle encountered an unexpected error.

PluginImplementationError

status: 500

A PluginImplementationError error is a generic error thrown by Kuzzle on a plugin failure.

ServiceUnavailableError

status: 503

A ServiceUnavailableError error can be sent by Kuzzle if it overloaded and cannot temporarily accept new requests, or if the requested Kuzzle instance is shutting down.

Specific errors

These errors are specific to controller actions. Check controllers documentation.

NotFoundError

status: 404

A NotFoundError error is thrown if the requested resource could not be found (e.g. a document is requested with a non-existing id).

PartialError

status: 206

A PartialError error is thrown if Kuzzle was unable to process a subset of a multi-action request.

A PartialError can be triggered, for instance, if one or several queries inside a document:mCreate request failed.

The detail of each failure can be retrieved in the errors property of the error object.

Additional Properties

PreconditionError

status: 412

A PreconditionError error is thrown if Kuzzle was not able to process the request due to an invalid state.

For instance, this error can be generated when trying to create a document on a non-existing index.

SizeLimitError

status: 413

A SizeLimitError error is thrown by Kuzzle if the request size exceeds the limits defined in the configuration.

UnauthorizedError

status: 401

An UnauthorizedError error is thrown by Kuzzle when an authentication attempt failed, or if a requested resource needs an authentication to be accessed.