How To Fix RZ384 - Server not started with enqueue process, number cannot be changed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 384

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

What causes this issue?

This server was started according to the instance profile without
enqueue processes. In operation mode switching, it is not possible to
switch the number of enqueue processes from 0 to 1.

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 supposed to be 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 RZ384 - Server not started with enqueue process, number cannot be changed ?

  The SAP error message RZ384 indicates that the enqueue process is not started, which is crucial for managing locks in the SAP system. This error typically arises when the enqueue server is not running, which can lead to issues with data consistency and integrity in the SAP environment.
  Cause:
  
  Enqueue Server Not Started: The enqueue server process may not have been started due to various reasons, such as system configuration issues, server crashes, or manual intervention.
  Configuration Issues: Incorrect configuration in the instance profile or the SAP system settings can prevent the enqueue server from starting.
  Resource Limitations: Insufficient system resources (CPU, memory) can lead to the enqueue server failing to start.
  Database Issues: Problems with the database connection or database server can also prevent the enqueue server from functioning properly.
  
  Solution:
  
  
  Start the Enqueue Server:
  
  Use the SAP Management Console (SAP MMC) or transaction code SM51 to check the status of the enqueue server.
  If it is not running, you can start it manually. In the SAP MMC, right-click on the instance and select "Start" or use the command line to start the enqueue server.
  
  
  
  Check Instance Profile:
  
  Ensure that the instance profile is correctly configured. Look for parameters related to the enqueue server and verify that they are set correctly.
  You can check the instance profile using transaction RZ10.
  
  
  
  Review System Logs:
  
  Check the system logs for any errors or warnings that might indicate why the enqueue server is not starting. Use transaction SM21 to view the system log.
  
  
  
  Check for Resource Issues:
  
  Monitor system resources to ensure that there are enough CPU and memory available for the enqueue server to start. Use tools like top, htop, or the SAP transaction ST06.
  
  
  
  Database Connection:
  
  Verify that the database is up and running and that the SAP system can connect to it. Check the database logs for any issues.
  
  
  
  Restart the SAP System:
  
  If the above steps do not resolve the issue, consider restarting the entire SAP system. This can sometimes clear transient issues that prevent the enqueue server from starting.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM51: To check the status of application servers.
  RZ10: To manage instance profiles.
  SM21: To view system logs.
  ST06: To monitor system performance and resources.
  
  
  
  SAP Notes: Check for relevant SAP Notes in the SAP Support Portal that may provide additional troubleshooting steps or patches related to this error.
  
  
  Documentation: Refer to the official SAP documentation for more details on the enqueue server and its configuration.
  
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.