[HADOOP-7603] Set default hdfs, mapred uid, and hadoop group gid for RPM packages

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.20.205.0, 0.23.0
• Fix Version/s: 0.20.205.0, 0.23.0

Environment

Java, Redhat EL, Ubuntu

• Release Note: Set hdfs uid, mapred uid, and hadoop gid to fixed numbers (201, 202, and 123, respectively).
• Assignee: Eric Yang
• Reporter: Eric Yang
• Created: 02/Sep/11 01:59
• Updated: 19/Oct/11 00:26
• Resolved: 04/Oct/11 00:15

Description

Hadoop rpm package creates hdfs, mapped users, and hadoop group for automatically setting up pid directory and log directory with proper permission. The default headless users should have a fixed uid, and gid numbers defined.

Searched through the standard uid and gid on both Redhat and Debian distro. It looks like:

uid: 201 for hdfs
uid: 202 for mapred
gid: 49 for hadoop

would be free for use.