How To Fix EIT_REGISTRY027 - Open API Service &1 &2 can only be mapped to exactly one Handler class.

SAP Error Message - Details

• Message type: E = Error

• Message class: EIT_REGISTRY - Extension Item Template: Messages for Registry Check

• Message number: 027

• Message text: Open API Service &1 &2 can only be mapped to exactly one Handler class.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message EIT_REGISTRY027 - Open API Service &1 &2 can only be mapped to exactly one Handler class. ?

  The SAP error message EIT_REGISTRY027 indicates that there is an issue with the mapping of an Open API service to a handler class in the SAP system. This error typically arises when the system finds multiple handler classes that could potentially handle the same Open API service, which leads to ambiguity in the mapping.
  Cause:
  
  Multiple Handler Classes: The primary cause of this error is that there are multiple handler classes defined for the same Open API service. The system requires a unique mapping to a single handler class to process the service correctly.
  Configuration Issues: There may be misconfigurations in the service registry or the way the Open API services are defined.
  Duplicate Entries: There could be duplicate entries in the service registry or in the configuration that defines the mapping of services to handler classes.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Handler Classes:
  
  Go to the service registry in your SAP system and check the handler classes that are defined for the Open API service in question.
  Identify if there are multiple handler classes mapped to the same service.
  
  
  
  Remove Duplicates:
  
  If you find multiple handler classes, you need to decide which one is the correct handler for the service and remove or deactivate the others.
  Ensure that each Open API service is mapped to only one handler class.
  
  
  
  Update Configuration:
  
  If necessary, update the configuration settings to ensure that the correct handler class is associated with the Open API service.
  This may involve modifying the service definition or the handler class configuration.
  
  
  
  Test the Changes:
  
  After making the necessary changes, test the Open API service to ensure that it is functioning correctly without any errors.
  
  
  
  Consult Documentation:
  
  If you are unsure about the correct handler class or how to configure it, refer to the SAP documentation or consult with your SAP Basis or development team for guidance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error message.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Version Specifics: Be aware that the behavior and configuration options may vary depending on the version of SAP you are using, so ensure that you are looking at the correct documentation for your version.
  
  By following these steps, you should be able to resolve the EIT_REGISTRY027 error and ensure that your Open API services are correctly mapped to their respective handler classes.