How To Fix CLB452 - HTTP client: &1 failed with return code &2 and message &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB - SAIL: Common messages

• Message number: 452

• Message text: HTTP client: &1 failed with return code &2 and message &3

What causes this issue?

The return code &syst-msgv2& from the HTTP client signals that something
went wrong while performing a &syst-msgv1& action.
The extended message says &syst-msgv3&.

System Response

The communication could not be established.

How to fix this error?

Retry at a later time. If no connection is possible, contact your system
administrator.

Procedure for System Administrators

Check the HTTP connection in the IC Manager (transaction
<DS:TRAN.SICF>SICF</>).
The relevant proxy port and host for the given target platform are
defined in the
<DS:TRAN.CLB_PLATF>Server Settings</>.
The timeout for HTTP requests can be defined in the
<DS:TRAN.CLB_APPLI_PLATF>Application-Specific Server Settings</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB452 - HTTP client: &1 failed with return code &2 and message &3 ?

  The SAP error message CLB452 indicates that there was an issue with an HTTP client request, where the request failed with a specific return code and message. This error typically arises in scenarios involving HTTP communication, such as when SAP is trying to connect to an external web service or API.
  Cause:
  The error can be caused by several factors, including but not limited to:
  
  Network Issues: Problems with the network connection between the SAP system and the target server.
  Incorrect URL: The URL being accessed may be incorrect or malformed.
  Authentication Issues: The request may require authentication, and the credentials provided may be invalid or missing.
  Server Unavailability: The target server may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the outgoing request from the SAP system.
  SSL/TLS Issues: If the connection is over HTTPS, there may be issues with SSL certificates or protocols.
  Timeouts: The request may be timing out due to slow response times from the server.
  
  Solution:
  To resolve the CLB452 error, you can take the following steps:
  
  Check Network Connectivity: Ensure that the SAP system can reach the target server. You can use tools like ping or telnet to test connectivity.
  Verify the URL: Double-check the URL being used in the HTTP request to ensure it is correct.
  Review Authentication: If the service requires authentication, verify that the correct credentials are being used and that they are properly configured in the SAP system.
  Check Server Status: Ensure that the target server is up and running and can accept requests.
  Inspect Firewall Settings: Check if there are any firewall rules that might be blocking the request from the SAP system.
  Examine SSL/TLS Configuration: If using HTTPS, ensure that the SSL certificates are valid and that the SAP system is configured to use the correct SSL/TLS settings.
  Increase Timeout Settings: If the request is timing out, consider increasing the timeout settings in the HTTP client configuration.
  
  Related Information:
  
  Return Code & Message: The return code and message provided in the error (represented as &2 and &3) can give more specific information about the nature of the failure. You should look up these codes in the SAP documentation or online resources to get more context on the error.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide patches and updates.
  Transaction Codes: You can use transaction codes like SICF to manage HTTP services and SMICM to monitor the Internet Communication Manager (ICM) for any issues.
  
  By following these steps and gathering more information from the return code and message, you should be able to diagnose and resolve the CLB452 error effectively.