When you encounter an error using TOS, TOS returns information such as Code, RequestId, HostId, Message, and EC code to help you quickly identify and resolve the error.

Error Response Example

HTTP/1.1 400 Bad Request​
server: TosServer​
Date: Fri, 30 Jul 2021 13:55:03 GMT​
x-tos-request-id: 580c15f00eca4e70d84e3c4e036d0b64-ac12****​
x-tos-id-2: 580c15f00eca4e70d84e3c4e036d0b64-ac12****​
x-tos-ec: 0014-00000034​
Content-Type: application/json​
Content-Length: Content-Length​
​
{​
    "Error": {​
        "Code": "InvalidArgument",​
        "RequestId": "580c15f00eca4e70d84e3c4e036d0b64-ac12****",​
        "HostId": "kElQBDtQvIsxwFYgDlZVQQszhbHt****",​
        "Message": "multi destination is not support",​
        "EC": "0014-00000034"​
    }​
}​

Description:

response

Description

response	Description
Code	Returned error code. For more information, see Response Codes.
RequestId	Request ID, which you can use to troubleshoot the corresponding issue.
HostId	Host address used during the request.
Message	Error detailed description.
EC	Finer-grained error codes provided by TOS. Each error corresponds to a unique EC code. Compared to Code and Message, the EC code is more detailed and offers a more precise problem description, helping you quickly locate issues and find solutions. If a request fails, the EC code will be returned in both the response header (x-tos-ec) and the response body. You can use the EC code to independently diagnose the error cause and solution. For detailed steps, see Using EC codes for self-diagnosis.

Last updated: 2026.10.09 14:46:54

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