The Data Integration Service generates log events when you run a mapping in the Hadoop environment.
You can view logs for the Hive on MapReduce engine or the Blaze engine. You can view log events relating to different types of errors such as Hadoop connection failures, Hive query failures, Hive command failures, or other Hadoop job failures.
You can view reject files for the Hive engine in the reject file directory specified for the Data Integration Service. You cannot view reject files even if you configure a reject file directory for the Blaze engine on the Hadoop cluster nodes.