How To Fix SDBALM329 - Master database and standby database are no longer synchronized

SAP Error Message - Details

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 329

• Message text: Master database and standby database are no longer synchronized

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM329 - Master database and standby database are no longer synchronized ?

  The SAP error message SDBALM329 indicates that the master database and the standby database in a database replication setup are no longer synchronized. This can occur in various database systems that support high availability and disaster recovery configurations, such as SAP HANA, Oracle, or others.
  Causes:
  
  Network Issues: Temporary network disruptions can prevent the master database from sending updates to the standby database.
  Configuration Errors: Incorrect configuration settings in the database replication setup can lead to synchronization issues.
  Resource Constraints: High load on the master or standby database can cause delays in data replication.
  Database Failures: Hardware or software failures on either the master or standby database can interrupt synchronization.
  Long-running Transactions: If there are long-running transactions on the master database, they may block replication to the standby.
  Log File Issues: If the log files are not being processed correctly, it can lead to a backlog and eventual desynchronization.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the master and standby databases. Use tools like ping or traceroute to diagnose connectivity problems.
  Review Configuration: Verify the replication configuration settings in both the master and standby databases. Ensure that they are correctly set up according to the documentation.
  Monitor Resource Usage: Check the CPU, memory, and disk I/O on both databases. If either database is under heavy load, consider optimizing queries or increasing resources.
  Restart Replication: In some cases, restarting the replication process can help re-establish synchronization. This may involve stopping and starting the replication service.
  Check Logs: Review the database logs for any errors or warnings that could indicate the cause of the desynchronization. Address any issues found in the logs.
  Apply Updates: Ensure that both the master and standby databases are running the same version and have the latest patches applied.
  Manual Resynchronization: If the databases are significantly out of sync, you may need to perform a manual resynchronization, which could involve taking a fresh backup of the master database and restoring it to the standby.
  
  Related Information:
  
  Documentation: Refer to the official SAP documentation for your specific database system for detailed instructions on configuring and troubleshooting replication.
  SAP Notes: Check SAP Notes for any known issues or patches related to the SDBALM329 error message.
  Monitoring Tools: Utilize SAP monitoring tools (like SAP Solution Manager) to keep an eye on the health of your database systems and replication status.
  Support: If the issue persists, consider reaching out to SAP support for assistance, providing them with relevant logs and details about your environment.
  
  By following these steps, you should be able to identify the cause of the synchronization issue and implement a solution to restore synchronization between the master and standby databases.