anishek created HIVE-15780:
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Summary: HiveConf evaluation and management
Key: HIVE-15780
URL: https://issues.apache.org/jira/browse/HIVE-15780
Project: Hive
Issue Type: Improvement
Components: HiveServer2
Reporter: anishek
Assignee: anishek
This is a placeholder Jira to see if HiveConf class can be rewired to give
better performance and security.
* most of the variables in hive can be changed by the user, there are few
variables that are part of the "hive.conf.restricted.list" configuration, with
recent additions via HIVE-15713. Extending the list to include more admin /
cluster wide variables should be included.
* By default any new variable that is created is available for end user to
change, given this is a huge list and a lot them are cluster wide
configurations, it would be better that any instance of variables in hiveconf
should be part of system / restricted list with additional parameter during
object instance creation to include if user can change it.
* since this class extends hadoop Configuration class any _get*_ method called
on instance of HiveConf is evaluated for variable substitution etc, this is not
required except for few variables like "hive.downloaded.resources.dir", hence
the class could just have a map of most of the properties which should help in
faster configuration lookup.
* for every session we create a new instance of hiveconf, if we can segregate
the conf's into system level / user level etc then have some sort of composite
pattern to represent hive conf such that a single instance of system
configuration is used across sessions.
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