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Troubleshooting
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Last updated: 2024-02-02 14:40:45
Troubleshooting
Last updated: 2024-02-02 14:40:45
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Overview

If a COS request fails when calling this SDK, it will throw a CosXmlClientException (client exception) or CosXmlServiceException (server exception).
The client exception, CosXmlClientException, results from unexpected interaction issues between the client and the COS server, such as a failure to connect to the server, a failure to parse the data returned by the server, or the occurrence of an IO exception when reading a local file.
The server exception, CosXmlServiceException, occurs when the client interacts with the COS server normally, but the operation fails. For example, the client accesses a bucket that does not exist, deletes a file that does not exist, or does not have the permission to perform an operation.

Client Exceptions

CosXmlClientException contains the defined client error code and specific error message, such as local file IO exception. After such an exception is captured, we recommend that you print out the entire exception as it contains necessary factors for troubleshooting. The following describes the member variables of the exception:
Member
Description
Type
errorCode
Client error code, such as 10000, which indicates a parameter verification failure. For more information, see Error Codes
int
message
Client error message
string

Server Exceptions

The server exception, CosXmlServiceException, occurs when, for example, the client accesses a bucket that does not exist, deletes a file that does not exist, or does not have the permission to perform an operation, etc. CosXmlServiceException contains the status code returned by the server, the requestid, the error details, and so on. After an exception is captured, we recommend that you print out the entire exception as it contains necessary factors for troubleshooting. The member variables of exception are described as follows:
Member
Description
Type
requestId
Request ID, used to identify a request. It is very important for troubleshooting.
string
statusCode
Status code in the response. A 4XX status code represents a request failure caused by the client, and a 5XX status code represents a failure caused by a server exception. For more information, see Error Codes.
string
errorCode
Error code returned by the body when the request fails. For more information, see Error Codes.
string
errorMessage
Error message returned by the body when the request fails. For more information, see Error Codes.
string

Using the Diagnosis Tool

COS provides a self-help diagnosis tool to help you quickly locate request errors and debug the 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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