How To Fix RSDD_ZA057 - Server has no connection to BWA. Rerouting to other server...

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 057

• Message text: Server has no connection to BWA. Rerouting to other server...

What causes this issue?

The current server does not have an RFC connection to the BW
accelerator. However, a different server in your system has an RFC conn
ection to the BW accelerator. You will therefore be redirected to this
alternative server.

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?

To resolve the problem, you can restart the BW accelerator servers from
the server to which you have been redirected. The system selects this
action as default. If this problem reoccurs frequently, contact your
system administrator.

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 RSDD_ZA057 - Server has no connection to BWA. Rerouting to other server... ?

  The SAP error message RSDD_ZA057 indicates that the SAP system is unable to connect to the Business Warehouse Accelerator (BWA). This can occur for several reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the BWA server.
  BWA Server Down: The BWA server might be down or not running properly.
  Configuration Issues: Incorrect configuration settings in the SAP BW or BWA system can lead to connection failures.
  Resource Limitations: The BWA server may be overloaded or running out of resources (CPU, memory, etc.).
  Version Compatibility: There may be compatibility issues between the versions of SAP BW and BWA.
  Firewall Settings: Firewall settings may be blocking the connection between the SAP system and the BWA server.
  
  Solutions:
  
  Check BWA Server Status: Ensure that the BWA server is up and running. You can check the server logs for any errors or issues.
  Network Connectivity: Verify the network connection between the SAP system and the BWA server. You can use tools like ping or traceroute to check connectivity.
  Configuration Review: Review the configuration settings in both the SAP BW and BWA systems. Ensure that the BWA is correctly configured in the BW system.
  
  Check the settings in transaction RSCONN01 (for BWA connection).
  
  
  Resource Monitoring: Monitor the resource usage on the BWA server. If it is overloaded, consider optimizing queries or increasing resources.
  Check Firewall Settings: Ensure that the necessary ports are open and that there are no firewall rules blocking the connection.
  Update Software: If there are version compatibility issues, consider updating either the SAP BW or BWA to compatible versions.
  Reroute Configuration: If the BWA server is not available, you may need to configure the BW system to reroute queries to another available BWA server if you have a multi-server setup.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to BWA connectivity issues for any specific patches or updates that may address the problem.
  Logs and Traces: Review the logs in both the SAP BW and BWA systems for any additional error messages that can provide more context.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have faced similar issues.
  
  By following these steps, you should be able to diagnose and resolve the RSDD_ZA057 error effectively. If the problem persists, consider reaching out to SAP support for further assistance.