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Cloud Object Storage
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    Troubleshooting

    Last updated: 2024-02-04 16:51:44
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      Overview

      If a COS request fails when calling this SDK, it will throw a CosXmlClientError (client error) or CosXmlServiceError (server error).
      The client error, CosXmlClientError, 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 error when reading a local file.
      The server error, CosXmlServiceError, 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 Errors

      CosXmlClientError contains the defined client error code and specific error message, such as local file IO error. After such an error is captured, we recommend that you print out the entire error as it contains necessary factors for troubleshooting. The following describes the member variables of the error:
      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 Errors

      The server error, CosXmlServiceError, 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. CosXmlServiceError contains the status code returned by the server, the requestid, the error details, and so on. After an error is captured, we recommend that you print out the entire error as it contains necessary factors for troubleshooting. The member variables of error 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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