How To Fix BT857 - Internal error occurred when processing parallel RFCs

SAP Error Message - Details

• Message type: E = Error

• Message class: BT - Background processing messages

• Message number: 857

• Message text: Internal error occurred when processing parallel RFCs

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message BT857 - Internal error occurred when processing parallel RFCs ?

  The SAP error message BT857, which states "Internal error occurred when processing parallel RFCs," typically indicates an issue related to the execution of parallel Remote Function Calls (RFCs) in the SAP system. This error can arise due to various reasons, including system configuration issues, resource limitations, or bugs in the SAP software.
  Causes:
  
  Resource Limitations: The system may be running out of resources (e.g., memory, CPU) when trying to handle multiple parallel RFCs.
  Configuration Issues: Incorrect settings in the SAP system related to parallel processing or RFC configuration can lead to this error.
  Network Issues: Problems with network connectivity or performance can affect the execution of parallel RFCs.
  Software Bugs: There may be bugs in the SAP kernel or specific function modules that are being called in parallel.
  Lock Contention: If multiple RFCs are trying to access the same resources or database records, it can lead to contention and errors.
  
  Solutions:
  
  Check System Resources: Monitor the system's performance metrics (CPU, memory, etc.) to ensure that it has enough resources to handle parallel processing. If necessary, consider scaling up the resources.
  Review Configuration: Verify the configuration settings for parallel processing and RFC in the SAP system. Ensure that they are set according to best practices.
  Update SAP Kernel: Ensure that you are running the latest version of the SAP kernel and that all relevant patches have been applied. This can help resolve any known bugs.
  Analyze Logs: Check the system logs (transaction SM21) and developer traces (transaction ST22) for more detailed error messages that can provide insights into the root cause of the issue.
  Limit Parallel RFCs: If the issue persists, consider limiting the number of parallel RFCs being executed at the same time to see if that alleviates the problem.
  Network Diagnostics: Perform network diagnostics to ensure that there are no connectivity issues affecting the RFC calls.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SM21 (System Log), ST22 (Dump Analysis), and SM37 (Job Monitoring) to gather more information about the error.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide guidance on configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.