When importing a data object, the Developer tool sends a request to the Metadata Access Service along with the reference to the connection object.
The Metadata Access Service accesses the cluster configuration defined in the connection object.
The Metadata Access Service uses the Hadoop details from the cluster configuration and extracts the object metadata from the Hadoop cluster.
The Metadata Access Service returns the metadata to the Developer tool.
When you save the data object, the information is saved in the Model repository.