How To Fix LM_SEMAPHORE009 - Semaphore for system &1, client &2, process type &3 not created

SAP Error Message - Details

• Message type: E = Error

• Message class: LM_SEMAPHORE - Messages for LM Sempahore Handling

• Message number: 009

• Message text: Semaphore for system &1, client &2, process type &3 not created

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message LM_SEMAPHORE009 - Semaphore for system &1, client &2, process type &3 not created ?

  The SAP error message LM_SEMAPHORE009 indicates that a semaphore for a specific system, client, and process type could not be created. This error typically arises in the context of SAP's lock management system, which uses semaphores to control access to shared resources and ensure data integrity.
  Causes:
  
  Insufficient Permissions: The user or process attempting to create the semaphore may not have the necessary permissions.
  Resource Limitations: The operating system may have reached its limit for the number of semaphores that can be created. This can happen if there are too many processes running or if the system configuration limits are set too low.
  Configuration Issues: Incorrect configuration settings in the SAP system or the underlying operating system can prevent semaphore creation.
  System Load: High system load or resource contention can lead to failures in semaphore creation.
  Operating System Issues: Problems with the underlying operating system, such as kernel parameters not being set correctly, can also lead to this error.
  
  Solutions:
  
  Check Permissions: Ensure that the user or process has the necessary permissions to create semaphores. This may involve checking user roles and authorizations in SAP.
  Increase Semaphore Limits: If the operating system has reached its semaphore limit, you may need to increase the limits. This can typically be done by modifying kernel parameters (e.g., SEM settings in Linux).
  
  For example, on Linux, you can check and modify semaphore settings in /etc/sysctl.conf or by using the sysctl command.
  
  
  Review Configuration: Check the SAP instance profile and operating system settings to ensure they are configured correctly for semaphore usage.
  Monitor System Load: Use system monitoring tools to check for high load or resource contention. If the system is under heavy load, consider optimizing processes or increasing system resources.
  Restart SAP Services: Sometimes, simply restarting the SAP services or the entire server can resolve transient issues related to semaphore creation.
  Check Logs: Review the SAP system logs (e.g., dev_w0, dev_rfc) and operating system logs for any additional error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to semaphore issues for specific guidance and troubleshooting steps. SAP frequently updates its knowledge base with solutions to common problems.
  Operating System Documentation: Refer to the documentation for your specific operating system for details on managing semaphores and related kernel parameters.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.