How To Fix DBMAN421 - Errors occurred during parallel processing of query &2, RC: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: DBMAN - Data Manager Message Class

• Message number: 421

• Message text: Errors occurred during parallel processing of query &2, RC: &1

What causes this issue?

The data manager executed this query in parallel. The previously
mentioned errors occurred during execution of a subquery. These are not
errors that were caused by parallel execution itself.

System Response

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

How to fix this error?

Note the previous errors.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DBMAN421 - Errors occurred during parallel processing of query &2, RC: &1 ?

  The SAP error message DBMAN421 indicates that there were errors during the parallel processing of a query. The message typically includes two parameters: RC: &1 (Return Code) and &2 (the query or operation that encountered the error). 
  Causes:
  
  Database Issues: The underlying database may have encountered issues such as deadlocks, timeouts, or resource limitations.
  Query Complexity: The query being executed may be too complex or may not be optimized for parallel processing.
  Configuration Issues: There may be misconfigurations in the database or SAP system that affect parallel processing capabilities.
  Resource Limitations: Insufficient system resources (CPU, memory, etc.) can lead to failures in parallel processing.
  Network Issues: If the database is remote, network issues can also cause failures in query execution.
  
  Solutions:
  
  Check Database Logs: Review the database logs for any specific errors or warnings that can provide more context about the failure.
  Optimize the Query: Analyze and optimize the query to ensure it can be executed efficiently in parallel. This may involve simplifying the query or adding appropriate indexes.
  Adjust Parallel Processing Settings: Check the configuration settings for parallel processing in both the SAP system and the database. Adjust these settings if necessary.
  Monitor System Resources: Use monitoring tools to check the system's CPU, memory, and I/O usage. If resources are constrained, consider upgrading hardware or optimizing other processes.
  Retry the Query: Sometimes, transient issues can cause errors. Retrying the query after a short period may resolve the issue.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches and updates.
  
  Related Information:
  
  SAP Basis Team: Involve your SAP Basis team to help diagnose and resolve the issue, especially if it involves database configuration or system resources.
  Database Administrator (DBA): Collaborate with your DBA to investigate any database-specific issues that may be causing the error.
  SAP Community: Search the SAP Community forums for similar issues and solutions shared by other users.
  Documentation: Refer to SAP documentation for guidelines on optimizing queries and configuring parallel processing.
  
  By following these steps, you should be able to identify the root cause of the DBMAN421 error and implement a suitable solution.