Failed to load response data request content was evicted from inspector cache

When you see the message “Failed to load response data. Request content was evicted from inspector cache” in your browser’s console, it means that the network request made by your web application or website was not successful in retrieving the response data, and the content of the request has been evicted (removed) from the inspector cache.

The inspector cache is a feature of web browsers that temporarily stores previous network requests and their responses. This cache can be helpful for developers when inspecting and debugging network requests. However, if the cached response data is evicted, it means that the browser no longer has access to the content of that particular request.

This issue can happen due to various reasons, such as network connectivity problems, server timeouts, or if the request was intentionally aborted. Here are a few possible scenarios and their explanations:

Scenario 1: Network Connectivity Problems

In this scenario, the browser was unable to establish a connection to the server or lost the connection while retrieving the response data. This can occur due to a weak internet connection, server downtime, or network congestion.

Example:


fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));
  

If you encounter network connectivity problems, you may need to check your internet connection, try refreshing the page, or contact the server administrator to verify the server status.

Scenario 2: Server Timeouts

Sometimes, the server may take longer than the expected time to respond, causing a timeout error. This can happen if the server is under heavy load or if the request requires complex processing. When the request exceeds the specified timeout period, the browser assumes the response data is not coming and evicts it from the inspector cache.

Example:


fetch('https://api.example.com/data', { timeout: 5000 })
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));
  

To handle server timeouts, you can increase the timeout period or implement retry mechanisms in your code. It’s also a good practice to investigate and optimize your server’s performance if timeouts occur frequently.

Scenario 3: Aborted Requests

In some cases, the request may be intentionally aborted by the browser or the code handling the request. This can occur if the user navigates away from the page while the request is still ongoing, or if you explicitly abort the request using the AbortController API. When a request is aborted, the response data is evicted from the inspector cache since it’s no longer needed.

Example:


const controller = new AbortController();
const signal = controller.signal;

// Abort the request after 5 seconds
setTimeout(() => {
  controller.abort();
}, 5000);

fetch('https://api.example.com/data', { signal })
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));
  

To avoid aborted requests, make sure to handle user interactions correctly and consider using the AbortController API when necessary. Additionally, check the browser console for any error messages or warnings that could provide more details on the specific cause of the aborted request.

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