Can you prevent your asp net application from shutting down

ASP.NET Application Shutdown

One common concern for ASP.NET developers is how to prevent their application from shutting down unexpectedly. There are several scenarios where an application may shut down, such as idle , application pool recycling, or manual restart. In this article, we will explore different techniques to keep your ASP.NET application running continuously.

1. Configuring Idle Timeout

By , ASP.NET applications have an idle timeout set to 20 minutes. This means that if there are no requests to the application for 20 minutes, it will shut down. However, you can modify this timeout value in the web.config file to keep the application alive for a longer duration.


In the above example, we have set the session timeout to 60 minutes. This means that as long as there is activity the application every 60 minutes, it will not shut down due to idle timeout.

2. Handling Application Pool Recycling

Application pool recycling is another common cause of ASP.NET application shutdown. By default, IIS recycles the application pool after a number of requests or at specific time intervals. To prevent your application from shutting down during recycling, you can configure the recycling settings in IIS.

To configure recycling settings, follow these steps:

  1. Open IIS Manager.
  2. Select the application pool for your ASP.NET application.
  3. Click on “Recycling” the “Advanced Settings” menu.
  4. Adjust the recycling based on your requirements.

By customizing the recycling conditions, you can ensure that your application remains active even during application pool recycling.

3. Implementing a Heartbeat Mechanism

Another approach to prevent ASP.NET application shutdown is by implementing a heartbeat mechanism. This involves periodically sending requests to the application to keep it alive. One way to achieve this is by creating a background task or a separate thread that sends requests to the application at regular intervals.

public class HeartbeatTask
    private Timer _timer;

    public void Start()
        _timer = new Timer(KeepAlive, null, TimeSpan.Zero, TimeSpan.FromMinutes(10));

    private void KeepAlive(object state)
        // Send a request to the application to keep it alive
        // Example: HttpClient.GetAsync("");

In the above example, we have created a HeartbeatTask class that uses a to send a to the application every 10 minutes. This ensures that the application remains active and prevents it from shutting down due to inactivity.


Preventing ASP.NET application shutdown requires a combination of configuration settings and proactive measures. By adjusting idle timeout, handling application pool recycling, and implementing a heartbeat mechanism, you can ensure that your application stays up and running continuously. to customize these techniques based on your specific requirements and workload.

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