How To Fix SADL_GW034 - Sticky session request error: Discard not alone in changeset

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW -

• Message number: 034

• Message text: Sticky session request error: Discard not alone in changeset

Self-Explanatory Message

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• What is the cause and solution for SAP error message SADL_GW034 - Sticky session request error: Discard not alone in changeset ?

  The SAP error message SADL_GW034: Sticky session request error: Discard not alone in changeset typically occurs in the context of the SAP Gateway and the SAP Application Development Framework (SADL). This error is related to the handling of changesets in OData services, particularly when multiple operations are being processed in a single request.
  Cause:
  The error arises when there is an attempt to discard a change in a changeset that contains multiple operations. In OData, a changeset allows you to group multiple operations (like create, update, delete) into a single request. However, if you try to discard a change (e.g., a delete operation) while other operations are still present in the changeset, the system raises this error because it expects that the discard operation should be the only operation in that changeset.
  Solution:
  To resolve the SADL_GW034 error, consider the following steps:
  
  
  Review Changeset Structure: Ensure that the changeset you are sending contains only one operation if you intend to discard a change. If you have multiple operations, separate them into different changesets.
  
  
  Modify Client Logic: If you are developing a client application that interacts with the OData service, modify the logic to handle changesets correctly. Ensure that discard operations are not mixed with other operations in the same changeset.
  
  
  Check for Concurrency Issues: If multiple clients are trying to modify the same resource simultaneously, ensure that your application handles concurrency correctly. Implement proper locking or versioning mechanisms if necessary.
  
  
  Debugging: Use transaction codes like /IWFND/ERROR_LOG in the SAP Gateway to check for detailed error logs that can provide more context about the issue.
  
  
  Consult Documentation: Review the SAP documentation related to OData services and changesets to ensure compliance with best practices.
  
  
  SAP Notes: Check for any relevant SAP Notes or updates that might address this issue. Sometimes, specific patches or updates can resolve underlying bugs.
  
  
  Related Information:
  
  OData Protocol: Understanding the OData protocol and how changesets work is crucial for troubleshooting this error.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it plays a significant role in handling OData services.
  Error Handling: Implement robust error handling in your application to gracefully manage such errors and provide meaningful feedback to users.
  
  By following these steps, you should be able to resolve the SADL_GW034 error and ensure that your OData service interactions are functioning correctly.