How To Fix WSS101 - HTTP communication error

WSS101 - Overview

• Message type: E = Error

• Message class: WSS - Web Services Security

• Message number: 101

• Message text: HTTP communication error

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WSS101 - HTTP communication error ?

  SAP Error Message:
  WSS101 HTTP communication error
  
  
  Cause:
  The error message WSS101 HTTP communication error typically occurs when there is a problem in the HTTP communication between SAP and an external web service or system. This can be due to several reasons such as:
  
  Network connectivity issues (e.g., firewall blocking, DNS resolution failure).
  Incorrect URL or endpoint configuration in the SAP system.
  SSL/TLS handshake failures (certificate issues, protocol mismatches).
  Authentication failures (wrong credentials or missing authorization).
  Proxy server misconfiguration.
  The external web service is down or unreachable.
  HTTP protocol errors (e.g., 404 Not Found, 500 Internal Server Error).
  
  
  
  Solution:
  To resolve the WSS101 HTTP communication error, follow these steps:
  
  
  Check Network Connectivity:
  
  Verify that the SAP server can reach the external web service URL using tools like ping, traceroute, or telnet on the relevant port.
  Ensure no firewall or proxy is blocking the connection.
  
  
  
  Verify URL and Endpoint:
  
  Confirm that the URL configured in the SAP system (e.g., in SOAMANAGER or the relevant RFC destination) is correct