What to Watch For When Upgrading to Magento 1.9.1

Now that it has been a couple of months since Magento 1.9.1 was released we have had enough experience upgrading from older versions of Magento to 1.9.1 to discuss what we have found to be the important things to keep in mind when upgrading to that version. We have found that two major issues impact the upgrade:

Sending Emails Now Relies on the Magento Cron Job

One of the under the hood changes made in 1.9.1 is that most emails to be sent out are first placed in queue and then the queued emails are sent the next time the cron job for Magento is run. If you do not have a cron job configured or enabled (as was the case for one website we dealt with) then many emails, including order confirmation and transactional, will not been sent out.

If you are having a problem with emails not being sent in Magento 1.9.1 you can check if unsent queued emails are the problem by reviewing the core_email_queue table, which contains the emails that have been added to the queue. Once the cron job has run the “processed_at” value for emails will have the time that they were sent and if they have yet to be sent they will not have a value set for that.

During testing of the upgrade you will also need to make sure that the cron job is set up for the test installation as well.

PHP 5.3.0 or Newer Is Required

Up until version 1.9 the bare minimum version of PHP that Magento permitted was 5.2.0, in version 1.9.1 that has been increased to 5.3.0. For most part this isn’t an issue considering that PHP 5.3.0 was released in June of 2009 and the listed minimum PHP versions for Magento 1.9.1 is 5.4. Where it can cause an issue is if you are doing an upgrade from the very old Magento 1.3, which wasn’t designed to support PHP 5.3. If you are doing the test of the upgrade in the same server environment as the production website and you can’t use multiple versions of PHP at the same time you will need to either modify the existing Magneto installation to support at least PHP 5.3 or do the upgrade in two stages (first upgrading to 1.9, then changing the PHP version, and then doing the upgrade to 1.9.1).

3 thoughts on “What to Watch For When Upgrading to Magento 1.9.1”

  1. Hello! thank you for this post! I have started my online shop not so long ago. I have Magento 1.9.0 and I want to upgrate it. I want to ask what is better to do. Should I really need Magento 1.9.1.  or I should search for elder version of 1.9.0.
    also I am going to use extensions for shipping and payment which are more probably 1.9 compatible (i don’t know the exact version details). I looked here http://sam-ecommerce.com/blog/view/magento-community-edition-1.9.1-download, i thought it could help me to make a choice..But I do need good advice!

  2. Hi.  Very interesting post, Thanks.  I’ve just recently setup our site again and i’m about to run out of hair to pull out.  I cannot get the cron job to run emails.  I’ve setup in putty, checked the web for fixes, etc.  I can’t see where the issue is, its probably something simple.   Checked that i can send email from the server with a little php script i found on a site but nothing from Magento, even manual entering the link into Chrome direct to the cron.php make no difference.  Any help or guidance would be appriciated.  Quite willing to give access to assist.

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