How To Fix MDG_HDB_SEARCH021 - Error while connecting to SAP HANA

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_HDB_SEARCH -

• Message number: 021

• Message text: Error while connecting to SAP HANA

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_HDB_SEARCH021 - Error while connecting to SAP HANA ?

  The SAP error message MDG_HDB_SEARCH021 typically indicates an issue with connecting to the SAP HANA database from the Master Data Governance (MDG) application. This error can arise due to various reasons, including configuration issues, network problems, or database availability.
  Causes:
  
  Database Connection Configuration: Incorrect configuration settings in the connection parameters (e.g., hostname, port, user credentials).
  Network Issues: Problems with the network that prevent the application from reaching the HANA database.
  Database Availability: The HANA database might be down or not running.
  Authorization Issues: The user credentials used for the connection may not have the necessary permissions to access the database.
  Driver Issues: Missing or incompatible database drivers that are required for the connection.
  Resource Limitations: The HANA database may be under heavy load or may have reached its resource limits.
  
  Solutions:
  
  
  Check Connection Configuration:
  
  Verify the connection parameters in the MDG configuration settings. Ensure that the hostname, port, user ID, and password are correct.
  Use the SAP HANA Studio or other database tools to test the connection with the same credentials.
  
  
  
  Network Troubleshooting:
  
  Ensure that there are no firewall rules or network policies blocking access to the HANA database.
  Check if you can ping the HANA server from the application server.
  
  
  
  Database Status:
  
  Check the status of the HANA database to ensure it is up and running. You can do this using the HANA Studio or command line tools.
  If the database is down, restart it and check for any error logs that might indicate why it was down.
  
  
  
  User Authorization:
  
  Ensure that the user account being used to connect has the necessary permissions to access the required schemas and tables in the HANA database.
  
  
  
  Driver Verification:
  
  Ensure that the correct version of the HANA database driver is installed and configured in the application server.
  Update the driver if necessary.
  
  
  
  Monitor Resource Usage:
  
  Check the resource usage on the HANA database to ensure it is not overloaded. If it is, consider optimizing queries or increasing resources.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to MDG and HANA connectivity for any known issues or patches.
  Logs: Review the application server logs and HANA database logs for more detailed error messages that can provide additional context.
  Documentation: Refer to the official SAP documentation for MDG and HANA for configuration guidelines and troubleshooting steps.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.