How To Fix RSAR511 - Database system cannot be reached

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAR - Data Transfer and Metadata Maintenance

• Message number: 511

• Message text: Database system cannot be reached

What causes this issue?

The database system &V1& is not accessible.

System Response

The system tried but failed to establish a database link. A short dump
has been registered.

How to fix this error?

Check
the settings in the link-maintenance screens,
whether your application server is configured as a client of the
database that you want to connect,
whether the database system can be accessed over the network.

Procedure for System Administrators

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 RSAR511 - Database system cannot be reached ?

  The SAP error message RSAR511, which states "Database system cannot be reached," typically indicates that the SAP system is unable to connect to the underlying database. This can occur for various reasons, and understanding the cause is crucial for troubleshooting. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Database Server Down: The database server may be down or not responding.
  Network Issues: There could be network connectivity issues between the SAP application server and the database server.
  Configuration Issues: Incorrect database connection parameters in the SAP system configuration (e.g., incorrect hostname, port, or database name).
  Database Instance Not Running: The specific database instance that the SAP system is trying to connect to may not be running.
  Firewall Restrictions: Firewalls may be blocking the connection to the database server.
  Resource Limitations: The database server may be overloaded or running out of resources (e.g., memory, CPU).
  Database Configuration Changes: Recent changes to the database configuration or updates may have affected connectivity.
  
  Solutions:
  
  Check Database Status: Verify that the database server is up and running. You can do this by logging into the database server and checking its status.
  Network Connectivity: Test the network connection between the SAP application server and the database server. You can use tools like ping or telnet to check connectivity.
  Review Configuration: Check the database connection settings in the SAP system (transaction DBACOCKPIT or RZ10 for profile parameters) to ensure they are correct.
  Restart Database Instance: If the database instance is not running, restart it and check if the issue persists.
  Firewall Settings: Ensure that any firewalls between the SAP application server and the database server allow traffic on the required ports.
  Monitor Resources: Check the resource usage on the database server to ensure it is not overloaded. If it is, consider optimizing queries or increasing resources.
  Check Logs: Review the SAP and database logs for any error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RSAR511 for any specific patches or updates that may address known issues.
  Database Documentation: Refer to the documentation for your specific database (e.g., Oracle, SQL Server, HANA) for troubleshooting connectivity issues.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your database administrator or SAP support for further assistance.