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The Data Hub profile is used by


the Data Hub Forwarding Agent and Data Hub Task Agent to connect to an Impala database via Cloudera JDBC, and an HDFS. This profile is also used to map the input UDRs to the Data Hub forwarding and an Impala database table. 

Data Hub Query also uses the profile to access the data stored in the Impala database.

The Data Hub profile is loaded when you start a workflow that relies on it. Changes to the profile become effective when you restart the workflow.