How To Fix SRT_WSP529 - Blocking required for "Request/Response" operation "&1{&2}"

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_WSP - Messages for SRT WSP

• Message number: 529

• Message text: Blocking required for "Request/Response" operation "&1{&2}"

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SRT_WSP529 - Blocking required for "Request/Response" operation "&1{&2}" ?

  The SAP error message SRT_WSP529 indicates that there is a blocking issue related to the "Request/Response" operation in the SAP Web Services framework. This error typically occurs when there is a conflict in the processing of web service requests, often due to concurrent requests or issues with the service configuration.
  Cause:
  
  Concurrent Requests: The error may arise when multiple requests are being processed simultaneously for the same operation, leading to a blocking situation.
  Service Configuration: There may be issues with the configuration of the web service, such as incorrect settings in the service definition or binding.
  Transaction Management: If the service is designed to handle transactions, improper transaction management can lead to blocking.
  Resource Locking: The underlying resources (like database entries) may be locked by another process, causing the current request to be blocked.
  
  Solution:
  
  Check for Concurrent Requests: Ensure that there are no multiple concurrent requests being sent for the same operation. If necessary, implement a queuing mechanism to handle requests sequentially.
  Review Service Configuration: Verify the configuration of the web service in the SAP system. Check the service definition, binding, and any related settings to ensure they are correctly set up.
  Transaction Handling: If the service involves transactions, ensure that the transaction management is correctly implemented. Use appropriate commit and rollback strategies.
  Monitor Resource Locks: Use transaction codes like SM12 (to check for locks) and SM21 (to check system logs) to identify if there are any locks on the resources that the web service is trying to access.
  Increase Timeout Settings: If the blocking is due to long-running processes, consider increasing the timeout settings for the web service calls.
  Error Handling: Implement proper error handling in the web service to manage exceptions and provide meaningful feedback to the calling application.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Web Service Monitoring: Use transaction codes like SRT_MONI to monitor web service calls and analyze the request/response flow.
  Performance Tuning: If the issue is related to performance, consider tuning the underlying database or application server settings to improve response times.
  Documentation: Refer to the official SAP documentation for the specific version of your SAP system for detailed information on web service configuration and management.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.