How To Fix PU171 - Error synchronizing DB buffers of application server &1

SAP Error Message - Details

• Message type: E = Error

• Message class: PU - Upgrade and Transport Log Messages

• Message number: 171

• Message text: Error synchronizing DB buffers of application server &1

What causes this issue?

Data was imported into the R/3 System database using a transport. If
the data involved is buffered data, you must synchronize the database
buffers of the R/3 System so that the R/3 System does not continue
working with old data.
An error occurred synchronizing the database buffers of the application
server &V1&.

System Response

The R/3 System may be operating with old data. The imported data may
not be visible or may be only partly visible in the R/3 System.

How to fix this error?

Analyze the <DS:TRAN.SM21>SysLog</> of the application server &V1&. It
contains more detailed information on the cause of the error.
If you have access to the OSS Notes, run a search there using the key
words:
PU171
SBUF_SYNCHRONIZE

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PU171 - Error synchronizing DB buffers of application server &1 ?

  The SAP error message PU171 indicates an issue with synchronizing database buffers on an application server. This error typically arises in environments where multiple application servers are involved, and it can be related to various factors, including configuration issues, network problems, or database inconsistencies.
  Cause:
  
  Network Issues: Problems with the network connection between the application server and the database can lead to synchronization failures.
  Database Locking: If the database is locked or busy, it may not allow the application server to synchronize its buffers.
  Configuration Errors: Incorrect settings in the SAP system configuration can lead to synchronization issues.
  Database Performance: High load on the database or performance issues can prevent timely synchronization.
  Version Mismatch: If there are discrepancies in the versions of the application server and the database, it may lead to synchronization problems.
  
  Solution:
  
  Check Network Connectivity: Ensure that the network connection between the application server and the database is stable and functioning correctly.
  Review Database Locks: Use database management tools to check for any locks or long-running transactions that may be affecting synchronization.
  Configuration Review: Verify the configuration settings in the SAP system, particularly those related to database connections and buffer management.
  Monitor Database Performance: Use performance monitoring tools to check the load on the database and identify any bottlenecks.
  Restart Application Server: Sometimes, simply restarting the application server can resolve temporary synchronization issues.
  Check SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  Consult SAP Support: If the issue persists, consider reaching out to SAP support for further assistance, especially if it is affecting production systems.
  
  Related Information:
  
  SAP Basis Administration: Understanding the role of SAP Basis in managing application servers and database connections can be helpful.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM51 (to check active application servers) and SM12 (to check for locks).
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  Performance Tuning: Regularly perform database and application server performance tuning to prevent such issues from occurring in the future.
  
  By following these steps, you should be able to diagnose and resolve the PU171 error effectively.