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20daa4d516
Due to the way in which we instantiate fair scheduler allocation loader, we donot read the config overrides from the HDFS config files. This is an unexpected behavior from users' POV since we typically support overrides like custom user -> group mapping via HDFS config (for ex: LDAPGroupsMapping) that eventually affects the query -> pool assignment. Fix: This patch loads the hadoop default configuration so that the underlying QueuePlacementPolicy is based on user specified overrides. Testing (manual): Changed the core-site.xml to use LDAPGroupsMapping instead of the default ShellBasedUnixGroupsMapping and confirmed that the correct group mapping plugin is loaded, by adding additional logging. Also, modified TestRequestPoolService to assert that the core-site xml overrides are loaded. Change-Id: Ibb93870c0cc37e2432a643a274931f1d3d13fb96 Reviewed-on: http://gerrit.cloudera.org:8080/9000 Reviewed-by: Bharath Vissapragada <bharathv@cloudera.com> Tested-by: Impala Public Jenkins