Due to the differences between the native environment and a Hadoop environment, you can only push mappings with certain sources to a Hadoop environment. Some of the sources that are valid in mappings in a Hadoop environment have restrictions.
You can run mappings with the following sources in a Hadoop environment:
HDFS complex file
HDFS flat file
The Blaze engine might not support all sources in a Hadoop environment. When the Data Integration Service finds a source that is not supported by the Blaze engine, it defaults to the Hive engine and runs the mapping on the Hadoop cluster.