How To Fix XS751 - Message cannot currently be transferred to node & due to connection error

SAP Error Message - Details

• Message type: E = Error

• Message class: XS - SAPconnect: All messages

• Message number: 751

• Message text: Message cannot currently be transferred to node & due to connection error

What causes this issue?

The message was processed correctly in the SAP system. Due to a
technical fault, the connection to the server &V2& could not be
established or was interrupted.

System Response

The system has marked the message for a resend attempt. The message has
not yet been sent.
Information from external system (if available)
&V4&&V3&
Procedure for the administrator
Check the connection from the SAP system to node &V1&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message XS751 - Message cannot currently be transferred to node & due to connection error ?

  The SAP error message XS751 indicates that there is a connection issue preventing a message from being transferred to a specific node. This error typically occurs in SAP systems that utilize the SAP HANA Extended Application Services (XS) or similar distributed architectures.
  Causes:
  
  Network Issues: There may be network connectivity problems between the nodes, such as firewalls blocking traffic or network outages.
  Node Unavailability: The target node may be down or not reachable due to maintenance or unexpected failures.
  Configuration Errors: Incorrect configuration settings in the SAP system or in the network settings can lead to connection issues.
  Resource Limitations: The target node may be overloaded or running out of resources (CPU, memory, etc.), causing it to reject new connections.
  Timeouts: If the connection takes too long to establish, it may time out, leading to this error.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the nodes. You can use tools like ping or traceroute to diagnose network issues.
  Verify Node Status: Check if the target node is up and running. You can do this by accessing the node directly or using monitoring tools.
  Review Configuration Settings: Ensure that the configuration settings for the nodes are correct. This includes checking the hostnames, ports, and any relevant parameters in the SAP configuration.
  Monitor Resource Usage: Check the resource usage on the target node. If it is overloaded, consider scaling resources or optimizing the workload.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the configuration to allow for longer connection attempts.
  Check Logs: Review the logs on both the sending and receiving nodes for any additional error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Refer to the official SAP documentation for XS and HANA for detailed information on configuration and troubleshooting.
  Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages to help diagnose the problem.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the XS751 error message.