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LLAP servers are a natural place to enforce access control at a more fine-grained level than “per file”. Since the daemons know which columns and records are processed, policies on these objects can be enforced. This is not intended to replace the current mechanisms, but rather to enhance and open them up to other applications as well.

Monitoring

Configurations for LLAP monitoring are stored in resources.json, appConfig.json, metainfo.xml which are embedded into templates.py used by Slider. 

LLAP Monitor Daemon runs on YARN container, similar to LLAP Daemon, and listens on the same port.  
The LLAP Metrics Collection Server collects JMX metrics from all LLAP Daemons periodically.  
The list of LLAP Daemons are extracted from the Zookeeper server which launched in the cluster. 

Web Services

HIVE-9814 introduces the following web services:

JSON JMX data - /jmx
JVM Stack Traces of all threads - /stacks
XML Configuration from llap-daemon-site - /conf 

HIVE-13398 introduces the following web services:

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