How To Fix /SDF/SMON009 - No Server selected. All servers are taken per default

SAP Error Message - Details

• Message type: E = Error

• Message class: /SDF/SMON -

• Message number: 009

• Message text: No Server selected. All servers are taken per default

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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Smart SAP Assistant

• What is the cause and solution for SAP error message /SDF/SMON009 - No Server selected. All servers are taken per default ?

  The SAP error message /SDF/SMON009 No Server selected. All servers are taken per default typically occurs in the context of the SAP S/4HANA system, particularly when dealing with the SAP S/4HANA Cloud or SAP S/4HANA on-premise environments. This error indicates that there are no available servers for processing the request, which can happen for several reasons.
  Causes:
  
  All Servers Busy: All available servers in the system are currently busy processing other requests, and there are no free servers to handle the new request.
  Server Configuration: The server configuration may not be set up correctly, leading to all servers being marked as busy or unavailable.
  Load Balancing Issues: If there is a load balancer in place, it may not be distributing the requests properly among the available servers.
  System Overload: The system may be experiencing high load due to a large number of concurrent users or processes.
  Technical Issues: There may be underlying technical issues with the server instances or the SAP system itself.
  
  Solutions:
  
  Check Server Status: Verify the status of the servers in the system. You can do this through transaction codes like SM51 (to check the status of application servers) or SM66 (to check the status of all servers in the system).
  Monitor System Load: Use transaction ST03N to analyze the workload and see if the system is overloaded. If so, consider optimizing the workload or increasing server capacity.
  Adjust Server Configuration: Review the server configuration settings to ensure that they are set up correctly and that there are available resources.
  Restart Servers: If you suspect that the servers are stuck or not responding, consider restarting the affected application servers.
  Check Load Balancer: If a load balancer is in use, check its configuration to ensure it is distributing requests correctly.
  Increase Server Instances: If the system is consistently running out of available servers, consider adding more server instances to handle the load.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for guidance on server management and performance tuning.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it is impacting business operations.
  
  By following these steps, you should be able to diagnose and resolve the /SDF/SMON009 error effectively.