How To Fix CM_EHFND_XMLRPC004 - Unexpected failure in HTTP communication

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_EHFND_XMLRPC - Messages for the XML-RPC protocol

• Message number: 004

• Message text: Unexpected failure in HTTP communication

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CM_EHFND_XMLRPC004 - Unexpected failure in HTTP communication ?

  The SAP error message CM_EHFND_XMLRPC004 indicates an unexpected failure in HTTP communication, typically occurring when there is an issue with the communication between SAP systems or between an SAP system and an external service. This error can arise in various contexts, such as when using SAP Gateway, OData services, or other web services.
  Causes
  
  Network Issues: Problems with the network connection, such as timeouts, DNS resolution failures, or firewall restrictions.
  Service Unavailability: The target service or endpoint may be down or not reachable.
  Configuration Errors: Incorrect configuration settings in the SAP system or the external service, such as incorrect URLs, authentication issues, or missing parameters.
  SSL/TLS Issues: Problems with SSL certificates, such as expired certificates or misconfigured SSL settings.
  Proxy Settings: If a proxy server is used, incorrect proxy settings can lead to communication failures.
  Resource Limitations: The server may be overloaded or running out of resources, leading to failed requests.
  
  Solutions
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the target service is stable. Use tools like ping or traceroute to diagnose connectivity issues.
  Verify Service Availability: Check if the target service is up and running. You can do this by accessing the service URL directly in a web browser or using tools like Postman.
  Review Configuration Settings: Double-check the configuration settings in the SAP system, including the service URL, authentication credentials, and any required parameters.
  Inspect SSL/TLS Configuration: If using HTTPS, ensure that the SSL certificates are valid and properly configured. You may need to import the certificate into the SAP trust store.
  Check Proxy Settings: If a proxy is used, verify that the proxy settings in the SAP system are correct and that the proxy server is functioning properly.
  Monitor System Resources: Check the server's resource usage (CPU, memory, etc.) to ensure it is not overloaded. If necessary, optimize the server or scale resources.
  Review Logs: Check the SAP application logs (transaction SLG1) and the HTTP trace (transaction ST01) for more detailed error messages that can provide additional context.
  
  Related Information
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues 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 found.
  Documentation: Review the official SAP documentation for the specific components you are working with (e.g., SAP Gateway, OData services) for best practices and troubleshooting tips.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.