How To Fix RZ379 - Server with enqueue process started, number cannot be changed to 0

SAP Error Message - Details

• Message type: E = Error

• Message class: RZ - Messages for Computing Center Management System

• Message number: 379

• Message text: Server with enqueue process started, number cannot be changed to 0

What causes this issue?

This server was started according to the instance profile with enqueue
processes. In operation mode switching, it is not possible to switch
the number of enqueue processes to 0

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

System Response

How to fix this error?

If lock management is to be no longer active on this server, the
instance profile must be changed and the system restarted.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RZ379 - Server with enqueue process started, number cannot be changed to 0 ?

  The SAP error message RZ379 indicates that there is an issue with the enqueue process in the SAP system. This error typically occurs when the enqueue server is unable to start or when there is a problem with the configuration of the enqueue process. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Configuration Issues: The enqueue server may not be properly configured in the instance profile or there may be inconsistencies in the configuration settings.
  Resource Limitations: The system may be running out of resources (e.g., memory, CPU) which prevents the enqueue process from starting.
  System Lock Issues: There may be existing locks or issues with the lock table that prevent the enqueue server from functioning correctly.
  Network Issues: Problems with network connectivity can also lead to issues with the enqueue server.
  Database Issues: If the database is not accessible or is experiencing issues, it can affect the enqueue process.
  
  Solutions:
  
  
  Check Configuration:
  
  Verify the instance profile settings for the enqueue server. Ensure that the parameters related to the enqueue process are correctly set.
  Check the enque/enable parameter in the instance profile to ensure it is set to 1.
  
  
  
  Restart the Enqueue Server:
  
  Sometimes, simply restarting the enqueue server can resolve transient issues. You can do this through the SAP Management Console (SAP MC) or using transaction SM51.
  
  
  
  Check System Resources:
  
  Monitor system resources (CPU, memory, disk space) to ensure that the server has enough resources to start the enqueue process.
  If resources are low, consider optimizing the system or increasing the resources available.
  
  
  
  Review Logs:
  
  Check the developer trace files (dev_enq*) and system logs (SM21) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  Database Connectivity:
  
  Ensure that the database is up and running and that there are no connectivity issues. You can check this by logging into the database directly.
  
  
  
  Check Locks:
  
  Use transaction SM12 to check for any existing locks that might be causing issues. If there are stale locks, you may need to delete them.
  
  
  
  SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error. There may be patches or updates that resolve known issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM51: To view and manage application servers.
  SM12: To manage locks.
  SM21: To view system logs.
  RZ10: To manage instance profiles.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for more detailed information on configuring the enqueue server and troubleshooting related issues.
  
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.