If you activate the feature of automatic activation after an data import, the following error message could occur:

Error while deactivating all data of type dataBase. info.magnolia.cms.exchange.ExchangeException: 1 error detected: 
Message received from subscriber: Parent content /categorization/34 is not yet activated or you do not have write access to it. Please activate the parent content before activating children and ensure you have appropriate rights on public

The reason is, that the Set of the imported node uuids is not sorted. So the DataActivateAllCommand tries to activate the childs before its parents. The super class contains an node sorting method, but this one will be never reached. See the execute method of BaseDataAllCommand.