What is ERR_CACHE_MISS Error?
ERR_CACHE_MISS is a Chrome-specific error message that indicates the browser cannot retrieve cache files from a website. This error represents a caching conflict between the browser’s stored data and the server’s current requirements. The complete error message displays as “Confirm Form Resubmission ERR_CACHE_MISS”.
The error occurs during form submission scenarios. Chrome displays this message when you fill out an online registration form and attempt to go backward using the back button after submission. The browser tries to retrieve data entered before from its cache but fails to do so. Clicking the reload button or accessing inactive tabs where search features were used can trigger the error. The browser stores information in its cache to accelerate page loading, but the err_cache_miss message appears when this cached data becomes outdated or conflicts with server requirements.
The difference between cache hits and cache misses clarifies this error’s nature. A cache hit occurs when the browser locates a valid file in its cache and uses it, and this results in faster loading. A cache miss happens when the browser searches its cache but cannot use what it finds. The browser had to fetch a fresh file from the server instead of using its local storage. This miss can occur for several normal reasons: first-time visits with empty caches, expired files exceeding their specified time limits, or files configured with no-cache or no-store directives.
The error becomes a user-facing problem with POST requests used in form submissions. The browser sends a POST request containing sensitive information to the server when you submit data through contact forms, checkout pages, or login screens. Attempting to go backward forces the browser to potentially re-send this data, which could result in duplicate submissions or charges. Chrome displays the confirmation dialog to protect users from data resubmission they did not intend. Firefox displays this same issue as “Document Expired” in versions 32 and above, but the underlying caching conflict remains similar across browsers. The error can appear on all versions of Windows, macOS and other platforms.
Why does ERR_CACHE_MISS Error happen?
Multiple factors contribute to err_cache_miss occurrences, ranging from user actions to server configurations.
Form resubmission after page refresh
Form submission combined with back or refresh actions is the main trigger for this error. Chrome cannot retrieve the POST response from cache at the time you submit a form through a POST request and then press the back button or refresh the page because POST responses are not cached. The browser requests data resubmission and displays the “Confirm Form Resubmission” dialog or err_cache_miss message depending on cache header configurations and form data availability. Browsers implement this behavior because POST requests are unsafe methods under HTTP specifications, and resubmitting POST data without user consent could cause duplicate credit card charges, duplicate orders or duplicate database entries.
Browser cache conflicts
Cache corruption occurs when cached data for particular websites becomes damaged and causes Chrome to struggle with retrieving the information needed. Local cache files become corrupted after crashes or disk errors. Outdated cache data is another conflict source, as websites change while cache retains old versions of files. Software glitches or sudden computer shutdowns contribute to cache file damage.
DevTools settings interference
Chrome DevTools contains a “Disable cache (while DevTools is open)” setting that prevents cache usage during development. This configuration triggers err_cache_miss warnings at the time it’s enabled as the browser bypasses cache and fetches fresh resources from servers. The error shows up when DevTools remains open, as closing and reopening the developer console increments error counts without page reloads.
Misconfigured cache-control headers
Overly restrictive cache-control headers cause unnecessary err_cache_miss errors. The Cache-Control: no-store directive instructs Chrome to never cache responses and represents the strictest option that prevents back button functionality. Mixing no-store and no-cache directives across templates creates situations where browsers remain uncertain whether response reuse is permitted.
How to fix ERR_CACHE_MISS Error as a user
Several user-side methods resolve err_cache_miss issues without server-level intervention.
Perform a hard reload
A hard reload bypasses cached files and forces Chrome to download fresh versions of all page resources. Press Ctrl+F5 or Shift+F5 on Windows and Linux to execute a hard reload. Mac users should press Command+Shift+R. This is different from a standard reload (F5 or the reload button), which may still use cached files. Hard reloading addresses temporary cache glitches and represents the main solution for most err_cache_miss occurrences.
Clear browser cache and cookies
Cached data that is corrupted or outdated can cause conflicts. Go to chrome://settings/clearBrowserData or press Ctrl+Shift+Delete (Windows) or Cmd+Shift+Delete (Mac). Select All time for the time range, then check Cookies and other site data and Cached images and files before you click Clear data. Restart Chrome after clearing to ensure changes take effect.
Disable browser extensions
Extensions interfere with caching mechanisms, especially ad blockers and privacy tools[112]. Access chrome://extensions to disable all extensions by toggling each off. Test the page in an incognito window (Ctrl+Shift+N or Cmd+Shift+N), which runs with extensions disabled by default. Reactivate extensions one by one to identify problematic ones.
Update Google Chrome
Outdated browser versions contain bugs that affect cache management. Go to Settings > About Chrome or Help > About Google Chrome[112]. Chrome checks for updates and installs them upon restart.
Reset Chrome settings to default
A reset restores original configurations while preserving bookmarks and passwords. Access Settings > Reset settings > Restore settings to their original defaults[151]. This removes misconfigured settings and disabled extensions while clearing cookies.
Flush DNS cache
DNS cache corruption causes network request failures. Windows users should open Command Prompt as administrator and run ipconfig /flushdns[142]. macOS users should open Terminal and execute sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder. Restart the computer after you flush DNS.
How to prevent ERR_CACHE_MISS Error on your website
Website owners can implement specific server-side configurations to prevent err_cache_miss occurrences for visitors.
Implement POST-Redirect-GET pattern for forms
The POST-Redirect-GET pattern prevents form resubmission problems by separating data processing from result display. The server processes the data and responds with a redirect (HTTP 303 or 3xx status code) to a separate confirmation page when a form submits via POST request. The browser then issues a GET request for the confirmation page and eliminates POST data from browser history. A page refresh or backward navigation triggers harmless GET requests instead of resubmitting POST data. Applications that use no-cache and no-store headers require consistent PRG implementation in every form to avoid browser history errors.
Configure proper cache-control headers
Cache-Control headers determine browser caching behavior. Static resources benefit from Cache-Control: public, max-age=31536000 for long-lived caching, while sensitive data requires Cache-Control: no-cache, no-store, must-revalidate. The no-store directive prevents any caching, whereas no-cache permits storage but mandates revalidation before reuse. Excessive use of no-store and no-cache directives increases server load.
Clear server-side and CDN cache
Outdated cached content on CDN networks creates conflicts that require periodic cache purging through hosting control panels or CDN dashboards.
Test with Chrome DevTools
The Network tab reveals cache behavior patterns and header configurations sent to browsers. Request header monitoring identifies misconfigured cache directives that cause errors.
FAQs
1. How can I fix the ERR_CACHE_MISS error in Google Chrome?
You can fix this error by performing a hard reload (Ctrl+F5 on Windows/Linux or Command+Shift+R on Mac), clearing your browser cache and cookies, disabling browser extensions, updating Chrome to the latest version, or resetting Chrome settings to default. These solutions address the most common causes of cache conflicts.
2. Is ERR_CACHE_MISS a critical security problem?
No, ERR_CACHE_MISS is not a security issue. It simply means Chrome had to fetch a fresh file from the server instead of using its locally stored cache. This is a normal occurrence that you’ll see frequently in developer tools. It only becomes a user-facing problem when it prevents a page from loading properly or interferes with form submissions.
3. What causes the ERR_CACHE_MISS error to appear?
The error typically occurs when you submit a form and then press the back button or refresh the page, causing Chrome to struggle with retrieving POST response data from cache. Other causes include corrupted or outdated browser cache files, interference from DevTools settings, and misconfigured cache-control headers on the website.
4. How do I clear corrupted browser cache that’s causing this error?
Navigate to chrome://settings/clearBrowserData or press Ctrl+Shift+Delete (Windows) or Cmd+Shift+Delete (Mac). Select “All time” as the time range, check both “Cookies and other site data” and “Cached images and files,” then click “Clear data.” Restart Chrome after clearing to ensure the changes take effect.
5. How can website owners prevent ERR_CACHE_MISS errors for their visitors?
Website owners should implement the POST-Redirect-GET pattern for forms, which separates data processing from result display and prevents form resubmission issues. Additionally, configure proper cache-control headers for different types of content, regularly clear server-side and CDN cache, and test caching behavior using Chrome DevTools to identify potential issues.