A concrete example - I am upgrading to 4.1 from 4.0, the upgrade was successful but I discovered that a plugin broke. Can I just revert the code.

The real live issue I am facing is having two wordpress "application" servers behind a load balancer connected to one DB. When there is the time to upgrade can I run the upgrade on one of them (which will upgrade the DB as well) and realistically expect the other to keep functioning?

1 Answer 1


There are usually minimal db changes from one version to the next, it should be safe to do the manual-reinstall procedure with 1 older version.

You can see the changes it does in wp-admin/includes/upgrade.php

  • 1
    The problem is not with the size of the changes, but with their backward compatibility. For example, If you use shared object caching will the value be correctly interpreted by both versions? Jan 6, 2015 at 8:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.