How To Fix RSDA021 - Near-line connection &1 to original BW system disconnected

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDA - BW Archiving: Messages

• Message number: 021

• Message text: Near-line connection &1 to original BW system disconnected

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 RSDA021 - Near-line connection &1 to original BW system disconnected ?

  The SAP error message RSDA021 indicates that there is a disconnection issue with the near-line storage (NLS) connection to the original BW (Business Warehouse) system. This error typically arises in scenarios where data is being accessed or processed from near-line storage, and the connection to the original BW system is lost or not properly established.
  Causes:
  
  Network Issues: There may be network connectivity problems between the BW system and the near-line storage.
  Configuration Errors: Incorrect configuration settings in the near-line storage connection or in the BW system can lead to disconnection.
  System Downtime: The original BW system may be down for maintenance or experiencing outages.
  Authorization Issues: The user or service account may not have the necessary permissions to access the near-line storage.
  Resource Limitations: Insufficient system resources (like memory or CPU) can lead to disconnections.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the BW system and the near-line storage is stable and functioning properly. You can use tools like ping or traceroute to diagnose network issues.
  Review Configuration Settings: Verify the configuration settings for the near-line storage connection in the BW system. Ensure that all parameters are correctly set.
  Monitor System Status: Check the status of the original BW system to ensure it is up and running. If it is down, coordinate with your IT team to resolve the issue.
  Check Authorizations: Ensure that the user or service account has the necessary authorizations to access the near-line storage. You may need to review and adjust roles and permissions.
  Resource Monitoring: Monitor system resources to ensure that there are no bottlenecks. If necessary, allocate more resources to the BW system or optimize existing resource usage.
  Restart Services: Sometimes, simply restarting the relevant services or the BW system can resolve temporary disconnection issues.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench) to check the configuration of your near-line storage.
  Logs and Traces: Check the system logs (transaction SM21) and traces (transaction ST22) for any additional error messages or warnings that could provide more context on the disconnection.
  SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that may address known issues related to near-line storage and the RSDA021 error message.
  Documentation: Review SAP documentation on near-line storage and BW system configurations for best practices and troubleshooting steps.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.