How To Fix RLFW072 - Subsystem isolation is active, but some servers have no server group.

SAP Error Message - Details

• Message type: E = Error

• Message class: RLFW - Messages for runlevel framework

• Message number: 072

• Message text: Subsystem isolation is active, but some servers have no server group.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RLFW072 - Subsystem isolation is active, but some servers have no server group. ?

  The SAP error message RLFW072 indicates that subsystem isolation is active, but some servers in the system do not belong to any server group. This can occur in a distributed SAP system where certain application servers are not properly configured to be part of a server group, which is necessary for the subsystem isolation feature to function correctly.
  Cause:
  
  Configuration Issues: The servers may not have been assigned to a server group in the SAP system configuration.
  Network Issues: There may be network connectivity issues preventing the servers from communicating with the server group.
  System Changes: Recent changes in the system landscape, such as adding or removing servers, may not have been properly reflected in the configuration.
  Isolation Settings: Subsystem isolation settings may have been enabled without ensuring that all servers are correctly grouped.
  
  Solution:
  
  
  Check Server Group Configuration:
  
  Go to transaction SMLT (Logon Load Balancing) or SMLG (Server Groups) in the SAP GUI.
  Verify that all application servers are assigned to the appropriate server group.
  
  
  
  Assign Servers to a Server Group:
  
  If any servers are found to be unassigned, you can assign them to the correct server group.
  Ensure that the server group is configured correctly to include all necessary servers.
  
  
  
  Review Isolation Settings:
  
  Check the settings for subsystem isolation in transaction RZ10 (Profile Parameters) or RZ11 (Profile Parameter Maintenance).
  Ensure that the isolation settings are appropriate for your system landscape.
  
  
  
  Restart the Application Servers:
  
  After making changes, it may be necessary to restart the affected application servers for the changes to take effect.
  
  
  
  Check for Network Issues:
  
  Ensure that there are no network issues preventing communication between the servers and the server group.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes that may provide additional guidance or patches related to this error message.
  
  
  
  Related Information:
  
  Subsystem Isolation: This feature is used to isolate certain subsystems (like background processing) to specific application servers to improve performance and manageability.
  Server Groups: Server groups are used in SAP to manage load balancing and ensure that requests are distributed evenly across available application servers.
  SAP Documentation: Refer to the official SAP documentation for detailed information on server groups and subsystem isolation.
  
  If the issue persists after following these steps, it may be beneficial to consult with SAP support or your system administrator for further assistance.