Reject files can be very large, and you can choose to write them to HDFS instead of the Data Integration Service machine. You can configure the Hadoop connection object to write to the reject file directory.

Grant permission to the following users:

Blaze user
Hadoop impersonation user
Mapping impersonation users

If the blaze user does not have permission, the Blaze engine uses a different user, based on the cluster security and the mapping impersonation configuration.