Query timeout expired

TDS || Query timeout expired

      

The "Query Timeout Expired" error occurs when a query takes longer than the configured timeout period to execute. If the query fails to retrieve data within this time frame, the system cancels the request and returns one of the following error messages:
  1. "Query timeout expired."
  2. "The timeout period elapsed prior to completion of the operation."
  3. "The server is not responding".
This error may occur due to several reasons, including:
  1. Large or Complex Queries : Queries involving large datasets, complex joins, or subqueries may take excessive time to execute.
  2. Database Performance Issues : Slow response from the database server due to high CPU/memory usage, insufficient indexing, or lock contention can delay query execution.
  3. Network Latency or Connection Issues : Slow network connections, packet loss, or unstable database connections can cause timeouts.
  4. Server Overload or High Traffic : If the database server is handling too many requests simultaneously, queries may take longer to process.
  5. Improper Timeout Configuration : The application’s timeout settings may be too low, causing queries to fail before completion.
  6. Deadlocks in the Database : If multiple transactions are waiting on the same locked resources, a deadlock may occur, preventing the query from completing.

To troubleshoot the issue, you can try the following steps:

Step 1: Press Windows + R to open the "Run" dialog, type services.msc, and hit Enter. This will open the Services window.

Step 2: Scroll down and find the service named "SQL Server (KDKSQL8)".

      

Step 3: Right-click on "SQL Server (KDKSQL8)" and select "Properties".

Step 4: In the Properties window, navigate to the "Path to Executable" field. This will display the location of the SQL Server binaries and the root directory where the SQL Server data and log files are stored.

      


Step 5: Before copying the data, you need to stop the SQL Server service. In the Services window, right-click on "SQL Server (KDKSQL8)" again and select "Stop".

Step 6: Navigate to the folder location identified in step 4. Copy the entire "Microsoft SQL Server" folder to any of your safe location.

Step 7: Once the folder is copied successfully, you have backed up the TDS data stored in Microsoft SQL Server.
Notes
Note : If there are multiple SQL Server instances running, it's crucial to stop all instances before copying the Microsoft SQL Server folder (Find each SQL Server service
 instance, such as "SQL Server (KDKSQL)", "SQL Server (KDKSQL1)", etc. → Right-click on each SQL Server service instance and select "Stop" to stop the service).

Step 8: After backing up the data, restart the SQL Server service by right-clicking on "SQL Server (KDKSQL8)" in the Services window and selecting "Start".

Idea
Additional Troubleshooting Steps
  1. Launch TDS Software, navigate to Tools → Update DB Script, and confirm by clicking OK to initiate a software restart.

      
      

After launching the TDS Software, verify if the issue is resolved. If the problem persists, it may indicate an underlying database issue.
  1. In this case, consider restoring the last data backup → Data Restore
  2. or performing a recovery process for TDS data → TDS Data Recovery Process.

By following these steps, you can troubleshoot and resolve the "Query Timeout Expired" error, ensuring smooth operation of your TDS software while keeping your data securely backed up.

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