Using Druid and Apache Hive
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Configure Apache Hive for Druid on Kerberos

It is important to use Hive LLAP daemons if you use Druid and Hive together on a Kerberos cluster.

Important If Kerberos is enabled on your cluster, to query Druid datasources that are imported from Hive, you must Hive LLAP daemons. You set a Hive property to enable LLAP daemons.
Enable LLAP mode.
hive.llap.execution.mode=all