[HDFS-10863] hadoop superusergroup supergroup issue

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 2.7.2
• Component/s: namenode

Environment

$ hadoop version
Hadoop 2.7.2

• External issue URL: http://jbigdata.fr
• Assignee: Unassigned
• Reporter: www.jbigdata.fr
• Created: 14/Sep/16 11:27
• Updated: 26/Sep/16 14:16
• Resolved: 26/Sep/16 14:16

Description

I want to match my unix user to HDFS: hduser:hadoop.

For the user I use the VE.

$ echo $HADOOP_HDFS_USER
hduser

For the group I use the hdfs-site.xml :

<property>
<name>dfs.permissions.superusergroup</name>
<value>hadoop</value>
</property>

The namenode log file show the parameter user/group values.

INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: fsOwner = hduser (auth:SIMPLE)
INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: supergroup = hadoop
INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isPermissionEnabled = true

Everything seems to be OK, but when I copy file form FS to HDFS the group is not correct. It keeps the supergroup default value.

Thoses shell commands show the issue:

$ ll /srv/downloads/zk.tar
rw-rr- 1 hduser hadoop 41984000 Aug 18 13:25 /srv/downloads/zk.tar
$ hdfs dfs -put /srv/downloads/zk.tar /tmp
$ hdfs dfs -ls /tmp/zk.tar
rw-rr- 2 hduser supergroup 41984000 2016-09-14 12:47 /tmp/zk.tar

I have:

rw-rr- 2 hduser supergroup 41984000 2016-09-14 12:47 /tmp/zk.tar

I expect :

rw-rr- 2 hduser hadoop 41984000 2016-09-14 12:47 /tmp/zk.tar

Why the HDFS group is not the value of the dfs.permissions.superusergroup property ?

@jbigdata.fr