How To Fix IST0309 - Asynchronous data read failed. Reading synchronously

IST0309 - Overview

• Message type: E = Error

• Message class: IST0 - General Messages IS Telecommunications

• Message number: 309

• Message text: Asynchronous data read failed. Reading synchronously

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IST0309 - Asynchronous data read failed. Reading synchronously ?

  The SAP error message IST0309, which states "Asynchronous data read failed. Reading synchronously," typically occurs in the context of SAP's Internet Transaction Server (ITS) or when dealing with Web Dynpro applications. This error indicates that the system attempted to read data asynchronously but encountered an issue, leading it to revert to synchronous reading.
  Causes:
  
  Network Issues: Problems with network connectivity can lead to timeouts or failures in asynchronous data retrieval.
  Configuration Errors: Incorrect settings in the ITS or Web Dynpro configuration can prevent proper asynchronous communication.
  Resource Limitations: Insufficient system resources (like memory or processing power) can hinder the ability to handle asynchronous requests.
  Application Logic Errors: Bugs or issues in the application code that prevent proper handling of asynchronous calls.
  Browser Compatibility: Some browsers may not fully support the asynchronous features used by the SAP application.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues affecting the connection between the client and the SAP server.
  Review