How To Fix SAML2086 - HTTP data for SAML2 logon in client &1 are too large (>4 KB)

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 086

• Message text: HTTP data for SAML2 logon in client &1 are too large (>4 KB)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2086 - HTTP data for SAML2 logon in client &1 are too large (>4 KB) ?

  The SAP error message SAML2086 indicates that the HTTP data for SAML2 logon in a specific client is too large, exceeding the limit of 4 KB. This error typically occurs during the SAML (Security Assertion Markup Language) authentication process when the data being sent exceeds the maximum allowable size.
  Cause:
  
  Excessive Data: The SAML assertion or the HTTP request contains too much data, which can happen if there are too many attributes being sent or if the data being sent is too verbose.
  Configuration Issues: Misconfiguration in the SAML setup, such as including unnecessary attributes or not properly managing the size of the SAML assertions.
  Client-Specific Settings: The error is specific to a client (indicated by &1), which may have different settings or configurations compared to other clients.
  
  Solution:
  
  
  Reduce the Size of the SAML Assertion:
  
  Review the attributes being sent in the SAML assertion. Remove any unnecessary attributes or reduce the amount of data being sent.
  Limit the number of claims or attributes that are included in the SAML response.
  
  
  
  Check SAML Configuration:
  
  Ensure that the SAML configuration in the Identity Provider (IdP) and Service Provider (SP) is optimized. This includes checking the attribute mappings and ensuring that only essential attributes are included.
  If you are using a custom SAML implementation, review the code to ensure that it is not generating excessive data.
  
  
  
  Increase the Limit (if applicable):
  
  In some cases, it may be possible to increase the limit for the HTTP data size in the SAP system configuration. However, this is not always recommended as it may lead to other issues.
  
  
  
  Test with Different Clients:
  
  If the issue is client-specific, test the SAML logon process with other clients to determine if the problem is isolated to one client or if it is a broader issue.
  
  
  
  Consult SAP Documentation:
  
  Review the official SAP documentation for SAML2 configuration and best practices to ensure compliance with recommended settings.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance. They may provide insights specific to your SAP version and configuration.
  
  
  
  Related Information:
  
  SAML2 Authentication: Understanding how SAML2 works and the role of assertions in the authentication process can help in troubleshooting.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide updates and patches.
  Logs and Traces: Review the logs and traces in the SAP system to gather more information about the error and the context in which it occurs.
  
  By following these steps, you should be able to identify the cause of the SAML2086 error and implement a solution to resolve it.