How To Fix SADT_RESOURCE046 - The If-Match header value does not match the server-side ETag for &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SADT_RESOURCE - Resource messages

• Message number: 046

• Message text: The If-Match header value does not match the server-side ETag for &1 &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADT_RESOURCE046 - The If-Match header value does not match the server-side ETag for &1 &2 ?

  The SAP error message SADT_RESOURCE046 indicates that there is a mismatch between the If-Match header value sent in an HTTP request and the server-side ETag (Entity Tag) for the resource being accessed. This typically occurs in scenarios involving RESTful APIs or OData services where optimistic concurrency control is implemented.
  Cause:
  
  
  ETag Mismatch: The ETag value in the If-Match header does not match the current ETag of the resource on the server. This can happen if:
  
  The resource has been modified since the client last retrieved it.
  The client is trying to update or delete a resource using an outdated ETag.
  The resource was deleted or replaced by another operation.
  
  
  
  Concurrency Issues: Multiple clients may be trying to modify the same resource simultaneously, leading to conflicts.
  
  
  Solution:
  
  
  Retrieve the Latest ETag: Before making an update or delete request, ensure that you retrieve the latest version of the resource, including its current ETag. This can be done by performing a GET request on the resource.
  
  
  Update the If-Match Header: Use the latest ETag value in the If-Match header of your subsequent request. This ensures that you are working with the most current version of the resource.
  
  
  Handle Conflicts Gracefully: Implement error handling in your application to manage cases where the ETag does not match. You may want to inform the user of the conflict and provide options to refresh the data or retry the operation.
  
  
  Check for Resource Deletion: If the resource has been deleted, ensure that your application logic accounts for this scenario and handles it appropriately.
  
  
  Related Information:
  
  ETag: An ETag is a unique identifier assigned by the server to a specific version of a resource. It is used for cache validation and to manage concurrency.
  HTTP Headers: The If-Match header is part of the HTTP protocol and is used to make conditional requests based on the ETag.
  Optimistic Concurrency Control: This is a strategy used to prevent conflicts in concurrent data access by using versioning (like ETags) to ensure that updates are made only if the resource has not changed since it was last read.
  
  By following these steps, you should be able to resolve the SADT_RESOURCE046 error and ensure that your application interacts correctly with the SAP system.