Magento (How to fix): One or more of the Cache Types are invalidated: Blocks HTML output.

27th FEB 2013 | Posted by in Debugging, Programming
Magento (How to fix): One or more of the Cache Types are invalidated: Blocks HTML output.

Some time has passed since I wrote original version of this article, Magento was at 1.5. these days…

Now, almost 2 years later I have decided to revamp the article since lot’s of feedback is gathered…

For that purpose, I have wrote small extension for it that you can find here:
https://github.com/tomasinchoo/Inchoo_InvalidatedBlockCacheFix/tags

I would like to thank all of you, especially people that gave suggestions in order to improve it.

Main difference is that it is done through observer and the code is wrapped up in extension for easier use.

Keep in mind that this extension is created for purposes of blog article at inchoo.net and as such can only be used as proof of concept. If you find it helpful in order to learn Magento, that is great, but be careful if you plan to use it in production environment even though I do :)

Some sites can’t afford to clean block cache on every product edit, so please keep that in mind.

Thanks, and looking forward to your feedback!

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Author

Tomas Novoselic

Team Leader / Senior Developer

At Inchoo, Tomas is a Team leader and Certified Magento Developer. He handles Magento modifications at any level. He also works closely with clients on Magento projects of any size and difficulty.

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Discussion 70 Comments

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  1. Ad
    31-01-2013 at 1:32 | #

    @Lewis
    Not really. Magento Cron runs on my server but the cache block still gets invalid. (1.7.0.2)
    Fix from travis worked fine. Thanks!

  2. anax
    05-02-2013 at 11:07 | #

    works like anything thanks a lot

  3. Tomas Novoselic
    27-02-2013 at 12:20 | #

    Hi everyone, I would just like to inform you that there is revamped version of this article if you are interested! ;)

  4. Alex
    27-02-2013 at 21:41 | #

    Why dont you check at least if cache is invalidated before flushing it? Something like
    $invalidateTypes = Mage::app()->getCacheInstance()->getInvalidatedTypes();

    if (!empty($invalidateTypes['block_html'])) {…

  5. Tomas Novoselic
    27-02-2013 at 22:41 | #

    @Alex I could have added it, however, it is ALWAYS invalidated, even if you save product with no NEW data, however I don’t see what can it break, so I will add it as soon as possible :) Thanks for feedback!

  6. Robert Readman
    28-02-2013 at 10:21 | #

    Already created this little extension myself, a few differences, I made a yes/no enable feature for the backend, in yours you have singleton inside the observer where as mine does not.
    Why should this be needed?

    Rob.

  7. Tomas Novoselic
    28-02-2013 at 10:48 | #

    Hi Robert,

    Well… you are right … singleton is not needed since if you don’t specify otherwise, you will always get singleton :)

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  11. M.Klooss
    12-03-2013 at 13:14 | #

    I’ve worte a Extension for this Issues.
    https://github.com/mklooss/Loewenstark_InvalidCache

    There just do the same, but i had add also a CronJob to check if one of the caches are invalid and clean this type.
    bacause the cache will be invalid, when u save Catalog Rules or each other settings:
    https://github.com/mklooss/Loewenstark_InvalidCache/blob/master/app/code/community/Loewenstark/InvalidCache/Model/Observer.php

  12. magento development
    13-03-2013 at 16:30 | #

    We are a gaggle of volunteers and starting a new scheme in our community.
    Your site provided us with helpful info to work on.
    You’ve done a formidable job and our whole community might be thankful to you.

  13. Casper
    02-05-2013 at 14:21 | #

    I am pretty new with Magento. How do I even “install” this extension?

    Thanks so much in advance!

  14. Tomas Novoseli?
    03-05-2013 at 7:03 | #

    @Casper – Just unpack it and copy to your site’s root directory…

  15. darren
    14-05-2013 at 1:00 | #

    Tomas, is there any tutorial that I can follow to install this extension?

  16. Tomas Novoselic
    14-05-2013 at 7:25 | #

    @darren You mean tutorial for copy-paste? Please check my previous comment: “@Casper – Just unpack it and copy to your site’s root directory…”

  17. Fulvio
    14-05-2013 at 9:42 | #

    Hi Tomas i tried to install your app but it gave me some problem, you write in the README file:
    ” ….It works only for US….. ”
    why only for US they look better than european or oceanian african etc… ? ;-)

  18. Tomas Novoselic
    14-05-2013 at 10:02 | #

    @Fulvio … Hm… where exactly did you read that it works only for US?
    https://github.com/tomasinchoo/Inchoo_InvalidatedBlockCacheFix/blob/master/README.md

    Maybe you read that one on this (OTHER) extension: https://github.com/tomasinchoo/Inchoo_USDisableRegions

    Well, in that case I’m afraid you should try some other extension like this one: http://www.magentocommerce.com/magento-connect/remove-or-change-displayed-states-and-regions-1964.html

    My version was created as part of the project on which client had no interest in shipping to any other country than USA so that save us some time and some cost to the client ;)

  19. Fulvio
    14-05-2013 at 10:07 | #

    tanks for reply. I read it in this file:
    README.md
    at
    https://github.com/tomasinchoo/Inchoo_InvalidatedBlockCacheFix/blob/1f84dd39a8291a84c4fe21f2ae0ab7abf77be947/README.md

    anyway thanks

  20. Tomas Novoselic
    14-05-2013 at 11:10 | #

    Hm… weird… that’s part of initial commit … I’m not sure how did you ended up there :)

    This is latest version in zip:
    https://github.com/tomasinchoo/Inchoo_InvalidatedBlockCacheFix/archive/1.0.0.zip

    Please try it by extracting it to your site root directory. It should work.

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