How To Fix AV417 - & & -> Connection cancelled without backup in buffer

SAP Error Message - Details

• Message type: E = Error

• Message class: AV - Decentral Order Control DASS

• Message number: 417

• Message text: & & -> Connection cancelled without backup in buffer

What causes this issue?

A communication partner attempts to send or receive, although
the connection has been broken.

System Response

Data transfer between HR and the subsystem is terminated.

How to fix this error?

Please start the SNA and DC system.
You can find more detailed information in file IBM/SC26-4399-1
Common Programming Interface - Communications Reference.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AV417 - & & -> Connection cancelled without backup in buffer ?

  The SAP error message AV417, which states "Connection cancelled without backup in buffer," typically occurs in the context of SAP's application server when there is an issue with the connection to the database or when a user session is terminated unexpectedly. This can happen for various reasons, including network issues, timeouts, or resource constraints.
  Causes:
  
  Network Issues: Intermittent network connectivity problems can lead to dropped connections.
  Timeouts: If a session remains idle for too long, it may be terminated by the server due to timeout settings.
  Resource Constraints: Insufficient memory or CPU resources on the application server or database server can lead to connection issues.
  Database Locking: If a database operation is taking too long or is blocked by another transaction, it may cause the connection to be canceled.
  Configuration Issues: Incorrect settings in the SAP system or database configuration can lead to connection problems.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the SAP application server and the database server. Use tools like ping or traceroute to diagnose connectivity.
  Increase Timeout Settings: Review and adjust the timeout settings in the SAP system and database to allow for longer sessions if necessary.
  Monitor Resource Usage: Use monitoring tools to check the resource usage on both the application server and database server. If resources are low, consider scaling up or optimizing the system.
  Review Database Locks: Check for any long-running transactions or locks in the database that may be causing delays. Resolve any blocking issues.
  Check SAP Configuration: Review the SAP configuration settings related to connections and buffers. Ensure that they are set correctly according to best practices.
  Update SAP and Database: Ensure that both the SAP system and the database are up to date with the latest patches and updates, as these may contain fixes for known issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to error AV417. SAP Notes often provide detailed troubleshooting steps and solutions.
  System Logs: Review the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  Transaction Codes: Use transaction codes like SM37 (Job Monitoring) and SM50 (Process Overview) to monitor running jobs and processes that may be related to the error.
  
  If the issue persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance, providing them with detailed logs and information about the circumstances under which the error occurs.