HTTP 408 Request Timeout — What It Means and How to Fix It

The HTTP 408 Request Timeout status code indicates that the server did not receive a complete request message within the time that it was prepared to wait. This typically happens when the client takes too long to send the entire request, and the server decides to close the connection.

Last updated: 2026-06-11

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                Status Code
                408
            

Name Request Timeout

Common Causes

Slow or unstable client network connection.
Large request body (e.g., file upload) taking too long to transmit.
Server-side timeout configurations being too aggressive or short.
Client application issues preventing timely request transmission.

Code Examples to Handle HTTP 408

curl -I https://httpbin.org/status/408

fetch('https://httpbin.org/status/408')
  .then(response => {
    if (response.status === 408) {
      console.log('Handled Request Timeout');
    }
  });

import requests

response = requests.get('https://httpbin.org/status/408')
if response.status_code == 408:
    print("Received Request Timeout")

How to Fix It

Client-side: Check network connectivity and speed. Ensure large uploads are handled efficiently (e.g., chunking).
Server-side: Review and adjust server timeout settings (e.g., `keepalive_timeout` in Nginx, `timeout` in Apache, or application-specific timeouts).
Client-side: Inspect client-side code for any delays in constructing or sending the request.
Server-side: Monitor server resources (CPU, memory, network I/O) to ensure it's not overloaded, which could indirectly cause timeouts.

💡 Example: A user is attempting to upload a very large video file through a web application. Due to a slow internet connection on the user's end, the upload takes an excessive amount of time, exceeding the server's configured request timeout. The server then responds with a 408 Request Timeout before the entire file is received.

🛠️ Developer Tip: When encountering a 408, consider implementing retry mechanisms on the client with exponential backoff, but also investigate server-side timeout configurations to ensure they are reasonable for expected client behavior.

Related Status Codes

Frequently Asked Questions

What causes HTTP 408?

HTTP 408 is caused when the server closes the connection because the client did not send a complete request within the server's allotted time. This is often due to slow client network speeds, large request bodies, or overly aggressive server timeout settings.

How do I fix HTTP 408?

To fix HTTP 408, you should first check the client's network connection and ensure large data transfers are optimized. On the server side, review and potentially increase the request timeout configurations. Developers should also examine client-side code for any delays in sending requests.