How To Fix WFD_WP1_MSG009 - An HTTP communication error has caused the MDW service request to fail.

SAP Error Message - Details

• Message type: E = Error

• Message class: WFD_WP1_MSG - Message Class for Worker Integration WP1

• Message number: 009

• Message text: An HTTP communication error has caused the MDW service request to fail.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WFD_WP1_MSG009 - An HTTP communication error has caused the MDW service request to fail. ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WFD_WP1_MSG009: An HTTP communication error has caused the MDW service request to fail.
  
  Cause:
  This error occurs when the SAP system tries to communicate with the Master Data Workflow (MDW) service via HTTP, but the communication fails. The failure can be due to several reasons, including:
  
  Network connectivity issues between the SAP system and the MDW service endpoint.
  Incorrect or unreachable URL configured for the MDW service.
  The MDW service is down or not running.
  Firewall or proxy blocking HTTP requests.
  SSL/TLS certificate issues if HTTPS is used.
  Authentication or authorization failures when accessing the MDW service.
  Timeout settings causing the request to fail before completion.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Network Connectivity:
  
  Verify that the SAP application server can reach the MDW service host.
  Use tools like ping, telnet, or curl from the SAP server to the MDW service URL.
  
  
  
  Verify MDW Service URL:
  
  Check the configuration in SAP where the MDW service URL is maintained.
  Ensure the URL is correct, reachable, and uses the correct protocol (HTTP/HTTPS).
  
  
  
  Check MDW Service Status:
  
  Confirm that the MDW service is up and running.
  Restart the MDW service if necessary.
  
  
  
  Firewall and Proxy Settings:
  
  Ensure that no firewall or proxy is blocking the HTTP requests.
  If a proxy is used, verify proxy settings in SAP and ensure authentication is handled properly.
  
  
  
  SSL/TLS Certificates:
  
  If HTTPS is used, check that the SSL certificates are valid and trusted by the SAP system.
  Import necessary certificates into the SAP system’s trust store if missing.
  
  
  
  Authentication and Authorization:
  
  Verify that the credentials used to access the MDW service are correct.
  Check if any changes in user permissions or roles have affected access.
  
  
  
  Timeout Settings:
  
  Increase timeout values if the MDW service takes longer to respond.
  Check SAP notes or documentation for recommended timeout settings.
  
  
  
  Review SAP Logs and Traces:
  
  Check SAP system logs (SM21), HTTP logs (SMICM), and workflow logs (SWI1) for more detailed error information.
  Look for any related error messages or stack traces.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SMICM – Internet Communication Manager, to check HTTP service status.
  SM21 – System log.
  SWI1 – Workflow log.
  STRUST – Manage SSL certificates.
  
  
  
  SAP Notes:
  
  Search for notes related to MDW HTTP communication errors.
  Example: SAP Note 1234567 (hypothetical) might provide specific fixes or patches.
  
  
  
  Documentation:
  
  SAP Master Data Governance (MDG) and Workflow integration guides.
  Network and security configuration guides for SAP HTTP communication.
  
  
  
  
  If after these checks the problem persists, consider raising a support ticket with SAP, providing detailed logs and configuration information.
  
  Let me know if you need help with specific steps or commands!