How To Fix TG154 - Log writer canceled with RC &

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 154

• Message text: Log writer canceled with RC &

INCLUDE TG150 OBJECT DOKU ID NA LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TG154 - Log writer canceled with RC & ?

  The SAP error message TG154, which states "Log writer canceled with RC &", typically indicates that the log writer process in the SAP system has been terminated unexpectedly. This can happen for various reasons, and understanding the cause is crucial for resolving the issue.
  Possible Causes:
  
  Database Issues: The log writer may be facing issues related to the underlying database, such as connectivity problems, database crashes, or resource constraints.
  Insufficient Resources: The system may be running low on memory, CPU, or disk space, which can lead to the log writer being unable to function properly.
  Configuration Errors: Incorrect configuration settings in the SAP system or the database can lead to the log writer being unable to perform its tasks.
  System Errors: There may be other system-level errors or crashes that affect the log writer process.
  Network Issues: If the log writer is trying to communicate with a remote database, network issues could cause it to fail.
  
  Solutions:
  
  Check Database Status: Ensure that the database is up and running without any issues. Check for any error logs or alerts in the database system.
  Monitor System Resources: Use monitoring tools to check the system's CPU, memory, and disk usage. If resources are low, consider optimizing the system or upgrading hardware.
  Review Configuration: Verify the configuration settings for both the SAP system and the database. Ensure that they are set correctly and are compatible with each other.
  Check Logs: Look at the SAP system logs (transaction SM21) and the database logs for any additional error messages that could provide more context about the failure.
  Restart the Log Writer: If the log writer has been canceled, you may need to restart it. This can often be done by restarting the SAP instance.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide patches or updates.
  Contact Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  Transaction Codes: You may find useful information in transactions like SM21 (System Log), SM37 (Job Monitoring), and ST22 (Dump Analysis).
  SAP Notes: Search for specific SAP Notes related to TG154 for any known issues or fixes.
  Documentation: Review the official SAP documentation for your version to understand the log writer's role and configuration.
  
  By following these steps, you should be able to diagnose and resolve the TG154 error in your SAP system.