[MAPREDUCE-871] Job/Task local files have incorrect group ownership set by LinuxTaskController binary - ASF JIRA

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Details

Type: Sub-task
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 0.21.0
Component/s: tasktracker
Labels:
None

Hadoop Flags:

Reviewed
Release Note:
Fixed LinuxTaskController binary so that permissions of local files on TT are set correctly: user owned by the job-owner and group-owned by the group owner of the binary and _not_ the primary group of the TaskTracker.

Description

~~HADOOP-4491~~ fixed the secure permissions of local files on a TT. While testing ~~HADOOP-4491~~ on a cluster, Karam Singh found out a bug. All the files/dirs have should be owned by the group corresponding to the group owner of the task-controller binary (via using getegid()) which in turn is a special group to which only TT user belongs. ~~HADOOP-4491~~ incorrectly set it to primary group of the TT via getgid(), and not the special group.