How To Fix SWF_RUN819 - Too many parallel requests exist (number=&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_RUN - Workflow Runtime System

• Message number: 819

• Message text: Too many parallel requests exist (number=&1)

Self-Explanatory Message

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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 SWF_RUN819 - Too many parallel requests exist (number=&1) ?

  The SAP error message SWF_RUN819 indicates that there are too many parallel requests being processed at the same time, exceeding the system's configured limits. This error typically occurs in the context of workflow processing, where multiple instances of a workflow or task are trying to run concurrently.
  Cause:
  
  Exceeding Parallel Processing Limits: The system has a defined limit for the number of parallel requests that can be processed simultaneously. When this limit is exceeded, the error is triggered.
  High Workload: A sudden spike in workload or a batch job that generates multiple workflow instances can lead to this error.
  Configuration Settings: The settings for parallel processing in the SAP system may be configured too low for the current workload demands.
  
  Solution:
  
  
  Increase Parallel Processing Limits:
  
  You can adjust the configuration settings for parallel processing in the SAP system. This can be done by modifying the relevant parameters in transaction RZ10 or RZ11.
  Look for parameters related to workflow processing, such as rdisp/wp_no_dia (number of dialog work processes) or rdisp/wp_no_btc (number of background work processes), and increase their values if necessary.
  
  
  
  Optimize Workflows:
  
  Review the workflows that are generating a high number of parallel requests. Consider optimizing them to reduce the number of concurrent instances.
  Implementing proper error handling and ensuring that workflows are designed to handle load efficiently can help mitigate this issue.
  
  
  
  Monitor System Performance:
  
  Use transaction SM66 or SM50 to monitor the active processes and identify any bottlenecks or processes that are consuming excessive resources.
  Analyze the workload and adjust the scheduling of batch jobs or workflows to avoid peak loads.
  
  
  
  Queue Management:
  
  If applicable, consider implementing queue management strategies to control the flow of requests and prevent overwhelming the system.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may provide additional guidance or patches related to this error. You can search for notes in the SAP Support Portal.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  SWI1: Work Item Selection
  SWI2_FREQ: Work Item Selection by Frequency
  SWI2_DURA: Work Item Selection by Duration
  
  
  Monitoring Tools: Use tools like ST22 (Dump Analysis) and SM21 (System Log) to check for any related issues or errors that may provide further insights.
  SAP Documentation: Refer to the official SAP documentation for detailed information on workflow management and parallel processing configurations.
  
  By following these steps, you should be able to address the SWF_RUN819 error and improve the handling of parallel requests in your SAP system.