How To Fix LDAP071 - LDAP Connector &1: Maximum number of connections exceeded

SAP Error Message - Details

• Message type: E = Error

• Message class: LDAP - LDAP Interface Messages in ABAP

• Message number: 071

• Message text: LDAP Connector &1: Maximum number of connections exceeded

What causes this issue?

It is not possible to logon to the directory through the LDAP Connector
&V1&, as this has reached the maximum number of possible connections.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Use a different LDAP Connector.
If manual selection of the LDAP Connector is not possible in the
application that you are using, contact your system administrator.

Procedure for System Administrators

If necessary, set up additional LDAP Connectors, to distribute the
connection load incurred.
Increase the maximum number of connections for the LDAP Connector
(Command line option of the LDAP Connector, this is not possible from
the SAP system).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LDAP071 - LDAP Connector &1: Maximum number of connections exceeded ?

  The SAP error message "LDAP071 LDAP Connector &1: Maximum number of connections exceeded" indicates that the LDAP (Lightweight Directory Access Protocol) connector has reached its maximum limit of concurrent connections to the LDAP server. This can happen due to various reasons, such as configuration settings, high load, or resource limitations.
  Cause:
  
  Configuration Limits: The maximum number of connections allowed to the LDAP server may be set too low in the configuration.
  High Load: There may be a high number of concurrent requests being made to the LDAP server, exceeding the configured limit.
  Resource Constraints: The LDAP server itself may have resource constraints or limitations on the number of connections it can handle.
  Connection Leaks: Connections may not be properly closed after use, leading to exhaustion of available connections.
  
  Solution:
  
  
  Increase Maximum Connections:
  
  Check the configuration settings of the LDAP server and increase the maximum number of allowed connections if possible.
  In the SAP system, you may need to adjust the settings in the LDAP connector configuration to allow for more connections.
  
  
  
  Optimize Connection Usage:
  
  Review the application logic to ensure that connections are being reused efficiently and closed properly after use.
  Implement connection pooling if not already in place, which allows multiple requests to share a limited number of connections.
  
  
  
  Monitor and Analyze Load:
  
  Use monitoring tools to analyze the load on the LDAP server and identify peak usage times.
  Consider load balancing or scaling the LDAP server if it is consistently reaching its connection limits.
  
  
  
  Check for Connection Leaks:
  
  Review the code and configuration to ensure that connections are being released properly after their use.
  Implement logging to track connection usage and identify any potential leaks.
  
  
  
  Consult Documentation:
  
  Refer to the SAP and LDAP server documentation for specific configuration parameters related to connection limits and best practices.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on configuration settings.
  LDAP Server Documentation: Review the documentation for the specific LDAP server you are using (e.g., Microsoft Active Directory, OpenLDAP) for details on connection limits and performance tuning.
  Performance Tuning: Consider general performance tuning practices for both the SAP system and the LDAP server to improve overall efficiency and reduce the likelihood of hitting connection limits.
  
  By addressing the above points, you should be able to resolve the "Maximum number of connections exceeded" error and improve the stability of your LDAP integration with SAP.