[INFO]  ..... WARN [http-nio-1990-exec-7] 
         [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] 
         doRollback Performing rollback. Transactions:
[INFO]  ->[PluginReadWriteTx]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (Session #.....)
[INFO]  – referer: ...../confluence/pages/viewpage.action?spaceKey=PP&title=x | 
        url: /confluence/rest/create-dialog/1.0/space-blueprint/dialog/web-items | 
        traceId: ..... | userName: .....

If you encounter this message it is very likely that you have deactivated an add-on that contains a space blueprint.

If it is only deactivated, simply activating it again will make the problem go away.

To reproduce the problem follow these steps:

1. Have an add-on installed that provides at least on space blueprint
2. Deactivate this add-on
3. Try to create a new space with the space wizard (Spaces -> Create Space)

Instead of having a dialog top select a space wizard, you see the error message in the view and log file.

After some further investigation we discovered that the problem is independent of the used database. With MySQL, PostgreSQL, and H2 the problem could be reconstructed.

We found that the problem first occurred with version 6.11.2 of Confluence, while in version 6.11.1 and before everything was alrightfine.

At first we checked if the problem was only related to the projectdoc Toolbox, since 6.11.2 has been around for some time. We thought it very unlikely that such a problem would have gone unnoticed by the community. In fact the problem is reproducible with every space blueprint.