How To Fix RSD_TREX522 - Find indexes with status "Unknown" ('&1')

SAP Error Message - Details

• Message type: E = Error

• Message class: RSD_TREX - Messages from TREX Aggregate Area

• Message number: 522

• Message text: Find indexes with status "Unknown" ('&1')

Description
This test checks whether the system has indexes of BWA indexes with
status "Unknown" (= U). This can only occur in rare exceptions when the
COMMIT call (CommitOptimize) is terminated during indexing.
It is then not clear whether or not the data of the previous indexing
call is available.
Repair
These indexes are rebuilt in repair mode.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSD_TREX522 - Find indexes with status "Unknown" ('&1') ?

  The SAP error message RSD_TREX522 indicates that there are indexes in the TREX (Text Retrieval and Extraction) system with a status of "Unknown." This can occur in the context of SAP BW (Business Warehouse) or SAP HANA environments where TREX is used for text search and indexing.
  Cause:
  The "Unknown" status for indexes typically arises from one of the following reasons:
  
  Index Corruption: The index may have become corrupted due to system issues or improper shutdowns.
  Inconsistent State: The index might be in an inconsistent state due to failed updates or other operational issues.
  Configuration Issues: There may be configuration problems in the TREX system or the underlying database.
  System Upgrades or Migrations: Changes in the system, such as upgrades or migrations, can lead to indexes being left in an unknown state.
  
  Solution:
  To resolve the RSD_TREX522 error, you can follow these steps:
  
  
  Check Index Status:
  
  Use transaction code RSD1 to check the status of the indexes in the InfoProvider. Look for any indexes that are marked as "Unknown."
  
  
  
  Rebuild Indexes:
  
  If you identify indexes with an "Unknown" status, you can attempt to rebuild them. This can be done using the following steps:
  
  Go to transaction RSD1 and select the InfoProvider.
  Choose the option to "Rebuild Index" or "Delete and Rebuild Index" for the affected indexes.
  
  
  
  
  
  Check TREX Administration:
  
  Access the TREX administration tool (usually via transaction TREX_ADMIN or similar) to check the overall health of the TREX system.
  Look for any errors or warnings that might indicate issues with the TREX configuration or operation.
  
  
  
  Monitor Logs:
  
  Review the logs for TREX and the BW system to identify any specific errors or warnings that could provide more context on the issue.
  
  
  
  System Restart:
  
  In some cases, a restart of the TREX server or the entire SAP system may help resolve transient issues.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  TREX Documentation: Familiarize yourself with the TREX documentation for best practices on index management and troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Monitoring: Implement regular monitoring of your SAP BW and TREX systems to catch issues early and maintain optimal performance.
  
  By following these steps, you should be able to address the RSD_TREX522 error and restore the proper functioning of your indexes in the TREX system.