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- If external_fe_port flag is >0, spins up a new HS2 compatible service port - Added enable_external_fe_support option to start-impala-cluster.py - which when detected will start impala clusters with external_fe_port on 21150-21152 - Modify impalad_coordinator Dockerfile to expose external frontend port at 21150 - The intent of this commit is to separate external frontend connections from normal hs2 connections - This allows different security policy to be applied to each type of connection. The external_fe_port should be considered a privileged service and should only be exposed to an external frontend that does user authentication and does authorization checks on generated plans Change-Id: I991b5b05e12e37d8739e18ed1086bbb0228acc40 Reviewed-by: Aman Sinha <amsinha@cloudera.com> Reviewed-on: http://gerrit.cloudera.org:8080/17125 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>