Enable YARN preemption

You must enable YARN preemption before setting up Hive low-latency analytical processing (LLAP). YARN preemption directs the capacity scheduler to position an LLAP queue as the top-priority workload to run among cluster node resources. You do not need to label the nodes to ensure LLAP has top priority.

1. In Ambari, select Services > YARN > Configs.
2. In YARN Features, set Pre-emption to Enabled (the default).

   

3. Save the settings.