Timeout when calling asp net core app on kestrel in docker on ubuntu linux with


ASP.NET is a popular programming language used for building web applications. It provides a for developing dynamic , web services, and web APIs. One common issue that developers may encounter when working with ASP.NET is a timeout error when calling an ASP.NET Core app on Kestrel in Docker on Ubuntu Linux. In this article, we will explore this issue and provide possible solutions.

Understanding the Timeout Error

When calling an ASP.NET Core app on Kestrel in Docker on Ubuntu Linux, a timeout error can occur if the request takes longer to process than the specified timeout duration. This can happen due to various reasons, such as slow network connections, heavy server load, or inefficient code execution.

Possible Solutions

1. Timeout Duration

One solution to resolve the timeout error is to increase the timeout duration. By default, ASP.NET Core has a timeout duration of 30 seconds. You can modify this value in the application's configuration file or programmatically in the code. Here's an example of how to increase the timeout duration to 60 seconds:

 static IWebHostBuilder CreateWebHostBuilder([] args) =>
        .ConfigureKestrel(options =>
            options.Limits.RequestHeadersTimeout = TimeSpan.FromSeconds(60);

2. Optimize Code Execution

approach to resolving the timeout error is to optimize the code execution. This involves identifying and improving any inefficient or time-consuming operations in the application. Here are a few tips to optimize code execution:

  • Use asynchronous programming: Asynchronous programming allows the application to handle multiple requests concurrently, improving overall performance and reducing the chances of timeouts.
  • Optimize database queries: that database queries are properly indexed and optimized to minimize execution time.
  • Implement caching: Implement caching mechanisms to store frequently accessed data, reducing the need for repeated computations.

3. Scale the Application

If the timeout error persists even after increasing the timeout duration and optimizing code execution, it may be necessary to scale the application. involves distributing the workload across multiple or to handle increased traffic and reduce the chances of timeouts. This can be achieved by using load balancers, container orchestration platforms, or cloud-based solutions.


Timeout errors when calling an ASP.NET Core app on Kestrel in Docker on Ubuntu Linux can be frustrating, but they can be resolved by increasing the timeout duration, optimizing code execution, or scaling the application. By implementing these solutions, developers can ensure that their ASP.NET applications are robust, performant, and capable of handling high traffic loads without encountering timeout errors.

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