How To Fix S1805 - No application server found on the database server

SAP Error Message - Details

• Message type: E = Error

• Message class: S1 - Statistik / SAP-Monitor

• Message number: 805

• Message text: No application server found on the database server

What causes this issue?

No SAP application server was found on the machine where the database
is running. For certain functions it is necessary to use a Remote
Function Call to a server on that machine. These functions will not be
possible.

System Response

The program continues after the error message.

How to fix this error?

Normally this message would mean that there is really no application
server on the database server. If one is convinced that there is indeed
such an application server, then the problem should be reported to SAP.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message S1805 - No application server found on the database server ?

  The SAP error message S1805 "No application server found on the database server" typically indicates that the SAP system is unable to connect to the application server associated with the database server. This can occur due to various reasons, including configuration issues, network problems, or server availability.
  Causes:
  
  Application Server Down: The application server may not be running or may have crashed.
  Network Issues: There could be network connectivity problems between the database server and the application server.
  Configuration Issues: The SAP system configuration may not be set up correctly, leading to the inability to find the application server.
  Database Connection Problems: Issues with the database connection settings in the SAP system can also lead to this error.
  Load Balancer Issues: If a load balancer is used, it may not be routing requests correctly to the application servers.
  
  Solutions:
  
  
  Check Application Server Status:
  
  Verify that the application server is up and running. You can do this by checking the server logs or using transaction codes like SM51 to see the list of active application servers.
  
  
  
  Network Connectivity:
  
  Ensure that there are no network issues between the database server and the application server. You can use tools like ping or traceroute to check connectivity.
  
  
  
  Review Configuration:
  
  Check the SAP profile parameters and configuration settings to ensure that the application server is correctly defined. Look for parameters like rdisp/mshost and rdisp/msserv.
  
  
  
  Database Connection:
  
  Verify the database connection settings in the SAP system. Ensure that the database is accessible and that the connection parameters are correct.
  
  
  
  Check Load Balancer:
  
  If a load balancer is in use, ensure that it is configured correctly and that it is routing requests to the available application servers.
  
  
  
  Restart Services:
  
  If the application server is down, restart the application server services. If necessary, restart the database server as well.
  
  
  
  Check Logs:
  
  Review the SAP system logs (transaction SM21) and the application server logs for any additional error messages that might provide more context about the issue.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to this error message for any specific patches or updates that may address the issue.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Documentation: Refer to the official SAP documentation for detailed information on system configuration and troubleshooting.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.