Fusion APIs return standard error codes when an API operation fails to process a request payload. In such scenarios, error codes and their corresponding HTTP status codes help you troubleshoot the issue.

The sample error response below shows the HTTP response body structure that is returned in case of error:

FU4000: Sample Error Response

HTTP Response Body:
{
  "message": "Bad Request",
  "errorCode": "FU4000",
  "traceID": "ysiadfhi-fjksdabfkld-fahjksdlk",
  "additionalInfo": {
    "id": "should is missing",
    "email": "invalid email"
  }
}
HTTP Status Code: 400

Note

traceId is a unique identity for any error that is generated. The same traceId gets logged and helps in faster debugging when you report an error.

Error codes

The following table lists the possible error codes returned on Fusion platform:

Error Code	HTTP Status Code	Error Code Description
FU4000	400	Bad Request Server was unable to process the client request due to invalid syntax.
FU4001	401	Unauthorised Client does not have valid authentication credentials (username, password, auth token) for the accessing the resource on the server..
FU4003	403	Forbidden Page or resource you are trying to access is forbidden.
FU4004	404	Not Found Page you are trying to access could not be found on the server as it might have been deleted or moved to a different location.
FU4005	405	Method Not Allowed Server has rejected the method for the accessing the requested resource.
FU4008	408	Request Timeout Due to incorrect URI specified in the request, the page takes longer time to load.
FU4009	409	Conflict When the client is trying to upload the same file as in the server, then this results in version control conflict.
FU4010	410	Gone Resource in the server is permanently deleted.
FU4012	412	Precondition Failed Precondition given in one or more of the header fields is evaluated to false when it is tested on the server.
FU4013	413	Payload Too Large Request payload is too large for the server to accept and process it.
FU4014	414	URI Too Long URI in the request is too long for the server to accept and process it.
FU4015	415	Unsupported Media Type Format of the requested resource is not supported by the server.
FU4017	417	Expectation Failed Expect header field could not be met by the server.
FU4029	429	Too Many Requests Client has sent too many API requests to the server.
FU4051	451	Unavailable For Legal Reasons Client requests a resource that cannot be served for legal reasons.
FU5000	500	Internal Server Error Server has some issue.
FU5001	501	Not Implemented Server cannot implement the request. This error needs to be resolved by the administrator on the server end.
FU5002	502	Bad Gateway Server act as a gateway or proxy for an upstream server. This error implies that the server received an invalid response from the upstream server due to which it cannot process the client request.
FU5003	503	Service Unavailable Server is overloaded with client requests. There might be a downtime on the server due to which it is unavailable.
FU5004	504	Gateway Timeout Server act as a gateway or proxy for an upstream server. This error implies that the server did not receive a timely response from the upstream server due to which it cannot process the client request.

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Error Codes and Handling

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Error codes