Symptoms

During an upgrade, the user is taken through the setup wizard. After configuring the database connection, a message appears indicating that tables already exist and will be overwritten.

Cause

The confluence-home directory has not been correctly identified, and a new confluence-home directory is created. This begins a new installation process.

Resolution

Confirm that confluence-init.properties is pointing to the existing confluence-home directory. If it's successful, the upgrade will happen automatically. There should be no Setup Wizard.

The following structure is a good practice for home and installation directories:

The entire HOME directory is outside the confluence-2.7.4-std or confluence-3.1.1 directory, all in the directory C:\Confluence.

Here's the structure inside the HOME directory:

The confluence-home directory is the same in both confluence-init.properties files:

For UNIX users, the same best practice applies. Be sure to specify the absolute path of your confluence_home directory in confluence-init.properties.