[HIVE-17289] EXPORT and IMPORT shouldn't perform distcp with doAs privileged user.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: HiveServer2, repl
• Labels: DR Export Import replication
• Hadoop Flags: Reviewed
• Assignee: Sankar Hariappan Assign to me
• Reporter: Sankar Hariappan
• Created: 10/Aug/17 12:37
• Updated: 22/May/18 23:58
• Resolved: 15/Aug/17 19:12

Description

Currently, EXPORT uses distcp to dump data files to dump directory and IMPORT uses distcp to copy the larger files/large number of files from dump directory to table staging directory. But, this copy fails as distcp is always done with doAs user specified in hive.distcp.privileged.doAs, which is "hdfs' by default.
Need to remove usage of doAs user when try to distcp from EXPORT/IMPORT flow.
Privileged user based distcp should be done only for REPL DUMP/LOAD commands.
Also, need to set the default config for hive.distcp.privileged.doAs to "hive" as "hdfs" super-user is never allowed.

Issue Links

• relates to: HIVE-16686 repl invocations of distcp needs additional handling
• links to: GitHub Pull Request #227