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Troubleshooting
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Last updated: 2024-02-04 11:37:32
Troubleshooting
Last updated: 2024-02-04 11:37:32
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Overview

If an SDK API call to request the COS service fails, the system will return the error information in the callback.

Sample error

cos.headBucket({
    Bucket: 'examplebucket-1250000000',
    Region: 'COS_REGION',
}, function(err, data) {
    if (err) {
        console.log(err.error);
    }
});

Client Exceptions

Parameter
Description
Type
err
Error code, which is returned when an error (network error or service error) occurs. If the request is successful, this parameter is empty. For more information, please see Error Codes.
Object
- error
Error message for the request
Object/String

Server Exceptions

Parameter
Description
Type
err
Error code, which is returned when an error (network error or service error) occurs. If the request is successful, this parameter is empty. For more information, please see Error Codes.
Object
- statusCode
HTTP status code, such as `200`, `403`, and `404`
Number
- headers
Headers
Object
- error
Error information
Object/String
- - Code
Error code returned by the body when the request fails. For more information, see Error Codes.
String
- - Message
Error message returned by the body when the request fails. For more information, see Error Codes.
String
- - RequestId
Unique ID of the request in the server request log that can be submitted when you contact us for troubleshooting
String


Using the Diagnosis Tool

COS provides a self-help diagnosis tool to help you quickly locate request problems and debug code.

Directions

1. Copy the request ID (RequestId) returned when the request error occurs.
2. Click Diagnosis Tool.

3. Enter RequestId and click Diagnose.
4. Wait and view the diagnostic result.
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