How To Fix /IWBEP/CM_MGW_RT099 - Caching on hub not allowed if read access logging is configured

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 099

• Message text: Caching on hub not allowed if read access logging is configured

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_RT099 - Caching on hub not allowed if read access logging is configured ?

  The SAP error message /IWBEP/CM_MGW_RT099 indicates that caching on the hub is not permitted when read access logging is enabled. This error typically arises in the context of SAP Gateway services, particularly when using the OData protocol.
  Cause:
  The error occurs because the system is configured to log read access for OData services, which is a requirement for compliance or auditing purposes. When read access logging is enabled, the system cannot cache responses on the hub, as caching could lead to inconsistencies between the logged data and the actual data being served.
  Solution:
  To resolve this error, you have a couple of options:
  
  
  Disable Read Access Logging:
  
  If logging is not a strict requirement for your application, you can disable read access logging for the OData service. This can be done in the SAP Gateway settings.
  Navigate to the transaction code /IWFND/MAINT_SERVICE and find the service in question. You can then adjust the settings to disable read access logging.
  
  
  
  Adjust Caching Settings:
  
  If you need to keep read access logging enabled, you may need to adjust your caching strategy. This could involve configuring the service to not use caching or to use a different mechanism that complies with the logging requirements.
  
  
  
  Review Service Implementation:
  
  Ensure that the service implementation is designed to handle the requirements of both caching and logging. This may involve modifying the service logic to accommodate the constraints imposed by read access logging.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or updates regarding this error. SAP Notes often contain patches or configuration tips that can help resolve specific issues.
  Documentation: Review the SAP Gateway documentation for best practices on configuring caching and logging. This can provide insights into how to balance performance with compliance needs.
  Performance Considerations: Understand the implications of disabling caching on performance, especially if your application is expected to handle a high volume of requests.
  
  Conclusion:
  The error /IWBEP/CM_MGW_RT099 is a safeguard to ensure data integrity when read access logging is enabled. Depending on your business requirements, you can either disable logging or adjust your caching strategy to resolve the issue. Always consider the implications of these changes on your application's performance and compliance.