How To Fix SNHI_ADT017 - Can not calculate HTTP-ETAG

SAP Error Message - Details

• Message type: E = Error

• Message class: SNHI_ADT - Messages

• Message number: 017

• Message text: Can not calculate HTTP-ETAG

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SNHI_ADT017 - Can not calculate HTTP-ETAG ?

  The SAP error message SNHI_ADT017: "Can not calculate HTTP-ETAG" typically occurs in the context of the SAP NetWeaver Application Server or when using the SAP Gateway. This error is related to the HTTP protocol and the handling of ETags (Entity Tags), which are used for web cache validation and conditional requests.
  Cause:
  The error can be caused by several factors, including:
  
  Missing or Incorrect Configuration: The HTTP service or the application might not be properly configured to handle ETags.
  Network Issues: There could be network-related issues that prevent the server from generating or sending the ETag.
  Resource Not Found: The resource being requested may not exist or is not accessible, leading to a failure in generating the ETag.
  Backend Issues: Problems in the backend system (like database issues or application logic errors) can also lead to this error.
  Caching Issues: If there are issues with the caching mechanism, it might not be able to generate a valid ETag.
  
  Solution:
  To resolve the SNHI_ADT017 error, you can try the following steps:
  
  
  Check Configuration: Ensure that the HTTP service and the application are correctly configured to handle ETags. Review the settings in the SAP Gateway or the relevant HTTP service configuration.
  
  
  Review Logs: Check the application logs and the HTTP trace logs for any additional error messages or warnings that could provide more context about the issue.
  
  
  Test Resource Accessibility: Verify that the resource you are trying to access is available and can be reached without issues. You can do this by trying to access the resource directly through a browser or a tool like Postman.
  
  
  Clear Cache: If caching is involved, try clearing the cache on both the client and server sides to see if that resolves the issue.
  
  
  Check Backend System: If the application relies on a backend system (like a database), ensure that the backend is functioning correctly and that there are no connectivity issues.
  
  
  Update SAP System: Ensure that your SAP system is up to date with the latest patches and updates, as this can resolve known bugs and issues.
  
  
  Consult SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  
  
  Contact SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance.
  
  
  Related Information:
  
  ETag: An ETag is a unique identifier assigned to a specific version of a resource. It helps in managing cache and ensuring that clients have the most recent version of a resource.
  HTTP Protocol: Understanding how HTTP works, including caching mechanisms and status codes, can help in troubleshooting issues related to web services.
  SAP Gateway: Familiarity with the SAP Gateway and its configuration can be beneficial, especially if you are working with OData services or RESTful APIs in SAP.
  
  By following these steps and understanding the context of the error, you should be able to diagnose and resolve the SNHI_ADT017 error effectively.