How To Fix SLC_QNR_RESP010 - HTTP ETag is missing; contact system administration

SAP Error Message - Details

• Message type: E = Error

• Message class: SLC_QNR_RESP - Message class for Questionnaire Response

• Message number: 010

• Message text: HTTP ETag is missing; contact system administration

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SLC_QNR_RESP010 - HTTP ETag is missing; contact system administration ?

  The SAP error message "SLC_QNR_RESP010 HTTP ETag is missing; contact system administration" typically indicates an issue related to the HTTP response from a service that is expected to include an ETag (Entity Tag) in its headers. ETags are used for web cache validation and conditional requests, allowing clients to determine if the content has changed since the last request.
  Cause:
  
  Missing ETag Header: The service that is being called is not returning an ETag header in its HTTP response. This could be due to misconfiguration in the service or the application that is consuming the service.
  Service Configuration: The service might not be configured to generate ETags, or there may be a bug in the service implementation.
  Network Issues: Sometimes, network issues or proxies can strip out headers, including ETags, from the HTTP response.
  Caching Issues: If there are caching mechanisms in place (like reverse proxies or load balancers), they might not be handling ETags correctly.
  
  Solution:
  
  Check Service Configuration: Ensure that the service being called is configured to generate and return ETags in its HTTP responses. This may involve checking the service's code or configuration settings.
  Review Application Logic: If you have access to the application code, review the logic that handles the HTTP response to ensure it correctly processes ETags.
  Network Configuration: Investigate any network devices (like proxies or load balancers) that might be interfering with the HTTP headers. Ensure they are configured to pass through ETags.
  Update Service: If the service is outdated or has known bugs, consider updating it to a newer version that correctly implements ETag handling.
  Contact System Administration: If you are not the system administrator, contact them with the error message and any relevant logs or details. They may have more insight into the service configuration and can help resolve the issue.
  
  Related Information:
  
  ETag Usage: ETags are part of the HTTP/1.1 protocol and are used for cache validation. They help reduce bandwidth and improve performance by allowing clients to cache responses.
  Debugging Tools: Use tools like Postman or curl to manually check the HTTP response from the service and see if the ETag header is present.
  SAP Notes: Check SAP's support portal for any notes or updates related to this error message, as there may be specific patches or recommendations available.
  
  If the issue persists after trying the above solutions, further investigation into the specific service and its environment may be necessary.