Symptoms

During restore, the logs show a message like:

ERROR [Importing data task] [confluence.importexport.impl.ReverseDatabinder] endElement net.sf.hibernate.PropertyValueException: not-null property references a null or transient value: com.atlassian.user.impl.hibernate.DefaultHibernateUser.name

Cause

This means there's an unexpected null value in a table. In the above example, the error is in the name column in the USERS table. We've also seen them in the ATTACHMENTS table.

Resolution

Remove the row with the null value, redo the xml export, and reimport.