As far as I can tell, this error was not being thrown yesterday on Chrome, and as of this morning, it is. I have not changed any of my browser settings. I have attached a screenshot (after opening/closing Developer Tools window four times):
This issue is tangentially similar to Stack Overlow post Failed to load resource under Chrome except that it only occurs when I "Inspect Element" in Chrome. Here are the details I have:
To the best of my ability I undid everything I did since last night (when I did not have this error) and the error persists. When I remove all pre-<html> PHP code, the error disappears.
When I only remove all the pre-<html> PHP code except
<?php session_start(); ?>
the error returns.
Since the error seems to involve PHP, I checked my error log, but there are no notices, warnings, nor errors. When I close the Developer Tools window and then open up the window without a page reload, the number of errors increments by one each time.
When I keep the window open, and then reload the page, the page reloads without throwing the error. However, as soon as I close the Developer tools window again, then open it (no page reload), the error is thrown. I checked my site on Firefox with Firebug enabled, and no errors are thrown, making it seem like a Chrome issue (version 38). My site seems to function normally otherwise. Other sites on device browsed via Chrome (for example, Yahoo) also experience this error.
Also, I have not manually changed any of my browser settings since months ago. As an additional note, this is the second strange error I have encountered in Chrome in the last year (see Stack Overflow question Failed to load resource: net::ERR_NETWORK_IO_SUSPENDED), to which no one was able to find a solution, even with a bounty offered.
Is there a way to prevent this error, or is this a browser-only issue? On a side note, when I open up Developer Tools in Chrome for Stack Overflow, there is no error thrown, so either Stack Overflow is not coded in PHP or they have a way to prevent this error. I think my site is not affected, but I am not 100% sure, and it makes me nervous :)
Per the developers, this error is not an actual failure, but rather "misleading error reports". This bug is fixed in version 40, which is available on the canary and dev channels as of 25 Oct.
Patch
On Chrome's latest update (38.0.2125.104 m at the moment), Google added the option to know whether the files loaded to the website were newly downloaded from the server - or read from the local cache.
When an error like yours "hits" the console - you know the files were just downloaded from the server and not read from the local cache. You can recreate this error by clicking Ctrl + F5 (refresh and erase cache).
It fits your description where Firebug (or equivalents) doesn't fire any errors to the console - whilst Chrome does.
So, the bottom line is - your're just fine and you can ignore this error - it's merely an indicator.
Check to see if you have previously disabled caching in Chrome when the developer console is open - the setting is under the console, settings icon > General tab: Disable cache (while DevTools is open)
Check for the presence of words like "ad", "banner" or "popup" within your file. I removed these and it worked. Based on this post here: Failed to load resource under Chrome it seems like Ad Block Plus was the culprit in my case.
See if you can recreate the issue in an Incognito tab. If you find that the problem no longer occurs then I would recommend you go through your extensions, perhaps disabling them one at a time. This is commonly the cause as touched on by Nikola
I had issues getting through a form because of this error.
I used Ctrl+Click to click the submit button and navigate through the form as usual.
I am on Chrome Dev 27, and in the Dev Tools settings checked Disable cache. When I reload a page, Chrome properly reloads all the resources used by map page, including the .js files. However, it doesn't automatically reload the corresponding source maps .map. Monitoring the HTTP traffic between Chrome my app, on subsequent page load, I don't see any request from Chrome for the .map files. How can I get Chrome to also reload the source maps?
The issue with Chrome not reloading the .map file is that it also won't reload the file from which the .js was generated, which in my case happens to be a CoffeeScript file (.coffee), which means that when debugging, in the Sources tab I am looking at an old version of the .coffee file, even if the new code (from the .js) is running.
I had this same issue just today. The wait to solve it for me was to close the coffee file's tab under sources, go to the network tab, right click, and select "Clear Browser Cache"
This fixed it for me.
That said, the mapped files don't always get "stuck" in cache for me... Only sometimes, and when they do, the clear cache trick fixes it.
Just had the same issue and found some additional solutions:
According to this commit and this bug report for chromium, the problem is solved and should not affect one of the next builds.
A little bit simpler solution for this problem than clearing the whole Browser Cache:
Open the source map in a browser tab and do a hard reload (depending on OS, try CTRL+F5). This refreshes the file and keeps the browser cache.
An alternate way and perhaps a good practise is to hack the source map generation by adding a parameter like ?build=12345. Refer to your build tool on how to manipulte the filename of the source map.
If you have access to the server config or a .htaccess, you could set the header Cache-Control: no-cache for the source map extension like '.js.map'.
Go to settings -> Show advanced settings -> Clear Browsing Data -> Check only "cached images and files" -> Click "clear browsing data"
This will clear the source maps you have cached in the browser without deleting all the cookies.
I resolved the issue by deleting the .map file and performing a hard reload (CTRL-F5).
I didn't want to lose all my history!
I am modifying a site's appearance (CSS modifications) but can't see the result on Chrome because of annoying persistent cache. I tried Shift+refresh but it doesn't work.
How can I disable the cache temporarily or refresh the page in some way that I could see the changes?
The Chrome DevTools can disable the cache.
Right-click and choose Inspect Element to open the DevTools. Or use one of the following keyboard shortcuts:
F12
Control+Shift+i
Command+Shift+i
Click Network in the toolbar to open the network pane.
Check the Disable cache checkbox at the top.
Keep in mind, as a tweet from #ChromiumDev stated, this setting is only active while the devtools are open.
Note that this will result in all resources being reloaded. Should you desire to disable the cache only for some resources, you can modify the HTTP header that your server sends alongside your files.
If you do not want to use the Disable cache checkbox, a long press on the refresh button with the DevTools open will show a menu with the options to Hard Reload or Empty Cache and Hard Reload which should have a similar effect. Read about the difference between the options to know which option to choose. The following shortcuts are available:
Command+Shift+R on Mac
Control+Shift+R on Windows or Linux
Clearing the cache is too annoying when you need to clear the cache 30 times an hour.. so I installed a Chrome Extension called Classic Cache Killer that clears the cache on every page load.
Chrome Store Link (free)
(Now without malware!)
Now my mock json, javascript, css, html and data refreshes every time on every page load.
I never have to worry if I need to clear my cache.
There are about 20 cache cleaners for Chrome I found, but this one seemed lightweight and zero effort. In an update, Cache Killer can now stay "always on".
Note: I do not know the plugin author in any way. I just found it useful.
Pull up the Chrome developer console by pressing F12 and then (with the console open):
Right click (or hold left click) on the reload button at the top of the browser and select "Empty Cache and Hard Reload."
This will go beyond "Hard Reload" to empty the cache entirely, ensuring that anything downloaded via javascript or etc. will also avoid using the cache. You don't have to mess with settings or anything, it's a quick 1-shot solution.
There are two more options to disable page caching in Chrome for good:
1. Deactivate Chrome Cache in the Registry
Open Registry (Start -> Command -> Regedit)
Search for: HKEY_CLASSES_ROOT\ChromeHTML\shell\open\command
Change the part after ...chrom.exe" to this value: –disable-application-cache –media-cache-size=1 –disk-cache-size=1 — "%1"
Example: "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" -disable-application-cache –media-cache-size=1 –disk-cache-size=1 — "%1"
IMPORTANT:
there is a space and a hyphen after ...chrome.exe"
leave the path to chrome.exe as it is
If you copy the line, be sure to check, if the quotes are actual quotes.
2. Deactivate Chrome cache by changing the shortcut properties
Right-click on the Chrome icon and select "Properties" in the context menu.
Add following value to the path: –disk-cache-size=1
Example:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" –disk-cache-size=1
IMPORTANT:
there is a space and a hyphen after ...chrome.exe"
leave the path to chrome.exe as it is
If you do not wish to edit Chrome's settings you may use incognito mode for the same results.
F12 to open Chrome DevTools
F1 to open DevTools Settings
Check Disable cache (while DevTools is open) as shown below:
This is currently on the Preferences tab which is the default. You may need to scroll down. This checkbox has been moved at least a couple times since this question was asked. Last I checked, it was in the middle column at the bottom. If you have it open on a thinner screen and there are 2 columns under Preferences, it may be near the top right. Feel free to update this post if it changes or comment and I'll update the post.
In addition to the disable cache option (which you get to via a button in the lower right corner of the developer tools window -- Tools | Developer Tools, or Ctrl + Shift + I), on the network pane of the developer tools you can now right click and choose "Clear Cache" from the popup menu.
Instead of hitting "F5"
Just hit:
"Ctrl + F5"
In the Canary Channel (and maybe the dev and stable channel will follow along) this is to be found as the second option overall on the left hand-side under the "General" section.
In addition to that, there is always the option to switch into Incognito Mode via Ctrl + Shift + N. Even though that unfortunately also ends your session.
To be clear, the disable cache checkbox in Chrome (v17 here, but since v15 I believe) is not in the main settings UI. It is in the developer tools settings UI.
From the browser window's wrench icon menu (prefs menu) choose Tools → Developer Tools
In the developer tools UI that appears, click the gear icon at bottom right.
Check the 'Disable cache' checkbox in the Network section.
Using Ctrl+Shift+R to refresh was nice but didn't get everything I needed.
still some things wouldn't refresh, such as data stored in js and css.
found a solution: a toolbar of google for chrome web developers. After you install the toolbar select options and "reset page".
Disable cache in chrome only works when you have dev tools open
Until the bug is fixed you could use Clear Cache Chrome plugin and you can also set a keyboard shortcut for it.
After installing it, right click and go to options:
Check Automatically reload active tab after clearing data:
Select Everything for Time Period:
And then you can go to Menu => Tools => Extensions:
Click on keyboard shortcuts at the bottom:
And set your keyboard shortcut, for example Ctrl + Shift +R:
Actually if you don't mind using the bandwidth it is more secure for multiple reasons to disable caching and advised by many security sites.
Chromium shouldn't be arrogant enough to make decisions and enforce settings on users.
You can disable the cache on UNIX with --disk-cache-dir=/dev/null.
As this is unexpected crashes may happen but if they do then that will clearly point to a more severe bug which should be fixed in any case.
This might help someone.
I have rigged my Nginx for crazy caching. Thus, disabling cache in network tools and explicitly clearing cache don't work.
A very simple yet boring workaround is, I just open a new Incognito Tab. Surprisingly it works, all the time!
A hard refresh in incognito mode does the trick anytime I wish to reload in the same mode.
When this question was asked, Chrome didn't support the Disable Cache feature. But now, you can find the "Disable Cache" feature in Network Tab in Chrome Dev Tools.
Network Tab with Cache Disabled
You can see that all the resources (I have filtered JS resources) have been fetched from network and not loaded from disk/memory cache.
Disable Cache not selected
You can see that when I refreshed the page but didn't select the "Disable Cache" feature, almost all the resources were loaded from Cache.
This works fine for local web development but there are certain limitations that I'd like to highlight. You can stop reading here if the solution discussed so far meets your use case.
Limitations
You have to keep the DevTools Open and Disable Cache Selected
When you disable the cache, it is disabled for all the resources in that tab. It makes things slow and is inefficient if you want to disable cache for only 1-2 resources
Using Requestly Chrome Extension to disable Cache for particular resources (JS/CSS/Images, etc)
Recently, I stumbled upon https://dev.to/requestlyio/disable-caching-of-particular-js-css-file-2k82 which helped me understand how you can disable cache for specific resources.
The trick here is to add a query parameter to your resource with random value every time the request is made. Using Requestly Query Param Rule, you can add a param like this
URL Contains mywebsite.com/myresource.js
Add param cb rq_rand(4)
rq_rand(4) is replaced by 4 digits random number when a request is made.
Requestly Query Parameter Rule to add random parameter
After adding the rule, JS/CSS files are not cached
Here you can see that "Disable Cache" is not selected and still the resources are not loaded from Cache because of a random parameter (cb - Read it as Cache buster) in the URL.
The good thing is you don't need to keep your dev tools open for having this behavior
You can keep this permanently ON and your browsing experience won't be affected too.
How to get the Rule
Here is the link using which you can browse & download the rule if you have Requestly installed - https://app.requestly.io/rules/#sharedList/1600501411585-disable-cache-stackoverflow
Disclaimer: I built Requestly but I think this could be helpful to a lot of web developers and hence sharing here.
How about a bookmarklet which changes the page name to prevent the page from cacheing. In Chrome you would create a new bookmark and then paste the code into the URL. Click the bookmark and the page will reload with timestamp to thwart the cache.
javascript:(function(){var idx = location.href.indexOf('?');var d = new Date();var str = location.href.substr(0,idx) + '?version=' + d.getTime();location.href=str; void 0;})();
I just got caught out but not necessarily due to Chrome.
I am using jQuery to make AJAX requests. I had the cache attribute set to true in the request:
$.ajax({
type: 'GET',
cache: true,
....
Setting this to false fixed my problem but this is not ideal.
I have no idea where this data is saved but I do know that chrome never hit the server for a request.
There is a better and quicker way now (Chrome version 59.x.x.):
Right-click onto the reload-icon (left of the url-field) and you get a drop-down menu, select the third option: 'empty Cache and Hard reload'.
This option is only available when the developer tools are open.
(Notice the difference to option 2: 'Hard reload' -cmd-shift-R). No cache emptying here!
There is a chrome extension available in the chrome web store named Clear Cache.
I use it every day and its a very useful tool I think. You can use it as a reload button and can clear the cache and if you like also cookies, locale storage, form data etc. Also you can define on which domain this happens. So can clear all this shit with only the reload button which you anyway have to press - on your chosen domains.
Very very nice!
You also can define a Keyboard Shortcut for this in the options!
Also another way is to start your chrome window in incognito-mode.
Here the cache also should be completely disabled.
One more option for disabling the cache is provided by my 3rd Chrome extension Page Size Inspector that disables the cache exactly the same way as Devtools does.
In addition, the extension quickly reports page size, cache usage, network requests and load time of a web page in a convenient way. Plus its open source at Github.
Not sure what you are using, but if you are using ASP.Net you can do the following which works like a charm:
<link href="#Url.Content("~/Content/Site.css")?time=#DateTime.Now" rel="stylesheet" />
Basically it will automatically append the Date and Time to the end of the file each time it is ran, meaning since the file name is technically different, you will never have to worry about it getting cached again.
I had the same problem, I tried :
Control Shift R,
Disable cache in F12
Control F5.
Then I discovered that using a .appcache manifest for a non https site is deprecated.
I removed my site.appcache file and its reference in the html tag and now I'm seeing the latest version of each page!
If you're using ServiceWorkers (e.g.: for Progressive web apps), you'll likely need to check "Update on reload" under Application > Service Workers in dev tools too.
Since version 50 (if I remember correctly), the "Disable cache" option was removed from the Devtool Settings. Go to the "Network" tab and there's the "Disable cache" option.
The problem with "annoying" cache in general layes in the framework :). Let's see details.
Most of frameworks uses in .htaccess (os equivalnent) derective redirecting all requests to frameworks "index",
BUT it the same time EXCLUDE files and directories requested by application directly.
(f.e. as for .htaccess typical directives are:
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(.+)$ index.php?url=$1 [QSA,L]
)
Thus ALL .js, .css files as graphics ones are not handled by frameworks "index".
And those files are generally most often changed during development.
That's why the cache control derective should not be placed in frameworks "index".
It should be palced in .htaccess.
F.e. for development process use:
Header set Cache-Control "no-store, no-cache, must-revalidate"
Header set Pragma "no-cache"
(Or for consecutive working versions, use "Etag" directive - check more in HTTP reference. Notice, that ETag is not intended for development.
In .htaccess there is no direct way to generate random number (or fast changing sequence like date UTC) to use in ETag, because - as I mentioned before - this is not what this is provided for).
Hope it helps and saves time.
Hey if your site is using PHP then place following little PHP snippet at the beginning of your html page :
//dev versioning - stop caching
$rand = rand(1, 99999999);
Now everywhere you load resources like CSS- or JS- files in a script or link element you append your generated random value to the request URL after appending '?' to the URI via PHP:
echo $rand;
Thats it! There will be no browser that caches you site anymore - regardless which kind.
Of course remove your code before publishing or simply set $rand to an empty string to allow caching again.
I have used the other options described above but I find that the best is to add the following parameter to the startup of chrome.exe.
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disk-cache-size=1
-media-cache=1
I find not disabling media cache is a good idea but it is here for completeness sake.
In actuality I want an option to completely disable the cache, to use the memory for IO instead of my disk (which would make load time 10x faster too!) but I don't think chrome or any browser for that matter has that option yet.
How can I disable the cache temporarily or refresh the page in some way that I could see the changes?
It's unclear which "cache" you're referring to. There are several different methods a browser can cache content persistently. Web Storage being one of them, Cache-Control being another.
Some browsers also have a Cache, used in conjunction with Service Workers, to create Progressive Web Apps (PWAs) providing offline support.
To clear the cache for a PWA
self.caches.keys().then(keys => { keys.forEach(key => console.log(key)) })
to list the names of the cache keys, then run:
self.caches.delete('my-site-cache')
to delete a cache key by name (i.e., my-site-cache). Then refresh the page.
If you see any worker-related errors in the console after refreshing, you may also need to unregister the registered workers:
navigator.serviceWorker.getRegistrations()
.then(registrations => {
registrations.forEach(registration => {
registration.unregister()
})
})
Chrome's Cache killer is by far the best option. Since the store URL to install cache killer is down, you can download the CRX file here:
https://www.crx4chrome.com/extensions/jpfbieopdmepaolggioebjmedmclkbap/
once the extension file is downloaded, open Chrome -> more tools -> extensions, then drag the CRX file from the File Explorer or your Desktop (depending the location where you downloaded the file) into the chrome window to install the extension.