In the Hadoop config files, we have some limited variable substitution, e.g. ${user.name} is replaced by the Linux-level effective user of the hadoop daemon that accesses a given config. Is there a substitution variable to get the Hadoop-level effective user? For instance, if I connect as “jkotireddy” to HiveServer2 using Beeline, ${user.name} expands to "hive" because that's the Linux-level effective user of HiveServer2; are there any other configuration variables which gives “jkotireddy” ?
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