Reason for Cache Manifest: Application Cache Error event: Resource fetch failed (2)

Question

My manifest file was working fine until this morning and I now keep getting the following error in chrome Version 36.0.1985.143 m

Creating Application Cache with manifest https://localhost/static/app/cache.manifest dashboard:1
Application Cache Checking event dashboard:1
Application Cache Downloading event dashboard:1
Application Cache Progress event (0 of 192) https://localhost/static/app/images/ui-icons_454545_256x240.png dashboard:1
Application Cache Error event: Resource fetch failed (2) https://localhost/static/app/images/ui-icons_454545_256x240.png

The resource is there when i follow through the link. But i can not find anywhere that details what the (2) means (seen lots for -1 but nothing for (2)) . I have a valid certificate for https as this was one of my pitfalls when first dealing with the cache manifest so do not believe that this is the issue.

Here is my manifest (it is generated by grunt and seems to be valid)

CACHE MANIFEST
# This manifest was generated by grunt-manifest HTML5 Cache Manifest Generator
# Time: Wed Aug 20 2014 10:37:07 GMT+0200 (W. Europe Daylight Time)

CACHE:
fonts/JohnstonITCStd-Bold.eot
fonts/JohnstonITCStd-Bold.otf
fonts/JohnstonITCStd-Bold.svg
fonts/JohnstonITCStd-Bold.ttf
fonts/JohnstonITCStd-Bold.woff
fonts/JohnstonITCStd-BoldIta.eot
fonts/JohnstonITCStd-BoldIta.otf
fonts/JohnstonITCStd-BoldIta.svg
fonts/JohnstonITCStd-BoldIta.ttf
fonts/JohnstonITCStd-BoldIta.woff
fonts/JohnstonITCStd-Light.eot
fonts/JohnstonITCStd-Light.otf
fonts/JohnstonITCStd-Light.svg
fonts/JohnstonITCStd-Light.ttf
fonts/JohnstonITCStd-Light.woff
fonts/JohnstonITCStd-LightIta.eot
fonts/JohnstonITCStd-LightIta.otf
fonts/JohnstonITCStd-LightIta.svg
fonts/JohnstonITCStd-LightIta.ttf
fonts/JohnstonITCStd-LightIta.woff
fonts/JohnstonITCStd-Medium.eot
fonts/JohnstonITCStd-Medium.otf
fonts/JohnstonITCStd-Medium.svg
fonts/JohnstonITCStd-Medium.ttf
fonts/JohnstonITCStd-Medium.woff
fonts/JohnstonITCStd-MediumIta.eot
fonts/JohnstonITCStd-MediumIta.otf
fonts/JohnstonITCStd-MediumIta.svg
fonts/JohnstonITCStd-MediumIta.ttf
fonts/JohnstonITCStd-MediumIta.woff
images/ajax-loading.gif
images/angle-purpure.png
images/angle-red.png
images/angle-yellow.png
images/apple-touch-icon-114x114.png
images/apple-touch-icon-144x144.png
images/apple-touch-icon-57x57.png
images/apple-touch-icon-72x72.png
images/apple-touch-startup-image-2048x1496.png
images/background.jpg
images/bathroom.png
images/blocker-white.png
images/blocker.png
images/bottom-arrow.png
images/box-shadow-bg.png
images/btn-arrow-bottom.png
images/btn-close.png
images/btn-counter.png
images/btn-left-panel.png
images/btn-sidebar-left-open.png
images/btn-top-panel.png
images/calendar5.png
images/checkbox-big.gif
images/checkbox.gif
images/close-lightbox-button.png
images/copy-icon-dark.png
images/copy-icon.png
images/copy_button.png
images/correct8.png
images/customer_photo_card.jpg
images/customer_photo_lightbox.jpg
images/customer_photo_profile.jpg
images/customer_photo_sidebar.jpg
images/customer_photo_smallcard.jpg
images/dashboard-tab-active-bg.png
images/dashboard-tab-active-gray-bg.png
images/decor-1.jpg
images/decor-2.jpg
images/decor-3.jpg
images/decor-4.jpg
images/decor-arrow-bottom-gray.png
images/decor-item-bg-purpure.png
images/decor-item-bg-red.png
images/decor-item-bg-yellow.png
images/decor-item-bg.png
images/delete-icon-16x16.png
images/delete-icon-24x24.png
images/delete-icon-32x32.png
images/delete-icon-48x48.png
images/delete-icon-64x64.png
images/dialog-decor-purpure.png
images/dialog-decor-red.png
images/dialog-decor-yellow.png
images/dialog-decor.png
images/dialog-overlay.png
images/flag_icon_de.png
images/flag_icon_fr.png
images/flag_icon_it.png
images/flag_icon_uk.png
images/flight-big.png
images/flight-small.png
images/flight.png
images/form-dialog-bg.png
images/general_user_card.jpg
images/general_user_card.png
images/general_user_lightbox.jpg
images/general_user_profile.jpg
images/general_user_sidebar.jpg
images/general_user_smallcard.jpg
images/help-bg.png
images/ico-contact-group-1-small.jpg
images/ico-contact-group-1.jpg
images/ico-contact-group-2-small.jpg
images/ico-contact-group-2.jpg
images/icon-1.png
images/icon-2.png
images/icon-attention.png
images/icon-delete-big.png
images/icon-delete.png
images/icon-dragable.png
images/icon-mail-small.png
images/icon-mail.png
images/icon-minus.png
images/icon-mobile-small.png
images/icon-mobile.png
images/icon-pdf-small.png
images/icon-pdf.png
images/icon-phone-small.png
images/icon-phone.png
images/icon-plus.png
images/icon-power.png
images/icon-remove-big.png
images/icon-remove.png
images/icon-user.png
images/icon.png
images/icons-bg.png
images/icons-big-bg.png
images/icons-slider-arrow-left.png
images/icons-slider-arrow-right.png
images/icons-small-bg.png
images/icons-xsmall-bg.png
images/info6.png
images/line25.png
images/lock-close-icon.png
images/lock-open-icon.png
images/logo-small.gif
images/logo.png
images/outing.png
images/radio-big.png
images/remove11.png
images/search28.png
images/select-arrow-bg.png
images/select-dropdown-bg.png
images/select-sep-bg.gif
images/sep-1-bg.gif
images/signal_disabled_big.jpg
images/signal_disabled_small.jpg
images/signal_pause_big.jpg
images/signal_pause_small.jpg
images/signal_waiting_validation_big.jpg
images/signal_waiting_validation_small.jpg
images/sleep.png
images/sort27.png
images/sub-header-bg.png
images/sub-header-bottom-bg.png
images/temp-1.jpg
images/temp-10.gif
images/temp-2.jpg
images/temp-3.jpg
images/temp-4.jpg
images/temp-5.jpg
images/temp-6.jpg
images/temp-7.jpg
images/temp-8.png
images/temp-9.jpg
images/time-line-bg.gif
images/time-line-sep-bg.gif
images/tooltips-bg.png
images/top-arrow-gray.png
images/top-arrow-white.png
images/ui-bg_flat_0_aaaaaa_40x100.png
images/ui-bg_flat_0_eeeeee_40x100.png
images/ui-bg_flat_55_ffffff_40x100.png
images/ui-bg_flat_75_ffffff_40x100.png
images/ui-bg_glass_65_ffffff_1x400.png
images/ui-bg_highlight-soft_100_f6f6f6_1x100.png
images/ui-bg_highlight-soft_25_0073ea_1x100.png
images/ui-bg_highlight-soft_50_dddddd_1x100.png
images/ui-icons_0073ea_256x240.png
images/ui-icons_454545_256x240.png
images/ui-icons_666666_256x240.png
images/ui-icons_ff0084_256x240.png
images/ui-icons_ffffff_256x240.png
css/app-styles.min.css
javascripts/app/router_dashboard.js
javascripts/app/router_profile.js
javascripts/app/router_settings.js
javascripts/app/router_test.js
javascripts/distro/app-dashboard-built.js
javascripts/distro/app-profile-built.js
javascripts/distro/app-settings-built.js
javascripts/dispatch.js

NETWORK:
*

So my question is does anyone know what the error means and how it can be fixed?

Edit: This problem disappeared on it's own after a day but I do not know what caused it or what I might have done to fix it the only action i did do was clear my flags in chrome (experimental features) but this did not have an immediate effect to remove the error

Here are some other facts about this error

• Other developers with the same code did not see this error (same version of chrome) (I know this makes for a bad SO question if it is not reproducible but I have no idea what the error even means hence the main reason for asking)
• This happened on both the development version and production version (development version using Apache and production using nginx)
• This did not happen to other websites that I know to use appcache (deezer.com)

edit: as of 04/09/2017 i still have never found the root cause for this error or seen it again actually

Answer 1

I faced the same problem and found two causes:

• I was using Chrome in incognito mode (it should be used in the normal mode)
• My server was returning a 301 redirect instead of a 200 OK (it should return a 200 OK)

I was able to solve the problem by fixing the above two.

Answer 2

I'm also experiencing the same on Chrome/36.0.1985.143 in Windows and the latest Chrome for OSX.

Looking in the access logs, for the file in question the server is returning a status code 200 (OK) rather than a 403 (Not Found)

Based on what you and I are seeing, I don't believe the file referenced in the "Resource fetch failed (2)" message is relevant.

We are seeing this on the very first item as its hit.

In my case I already expect the appcache to be up to date, and Apache should be returning HTTP status code 304 (Not Modified) so the Chrome knows that file is up to date.

So I think we may both have reached a limit, and what we are seeing is a side effect.

Quince, your AppCache Manifest looks valid. I'd like to get to the bottom of this also, can you provide further details please? I'm interested to know the total sizes of the files you've listed in the manifest above.