[HDFS-15034] fuse-dfs does not respect HADOOP_USER_NAME envvar with simple auth

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: fuse-dfs
• Assignee: Unassigned
• Reporter: István Fajth
• Created: 06/Dec/19 11:01
• Updated: 06/Dec/19 11:01

Description

In the fuse code, there is an explicit map fro the context uid to the username on the OS level with the help of getpwuid() system call.
As we have already a way to access the callers environment, to determine the kerberos ticket cache path, we can respect the HADOOP_USER_NAME setting in a SIMPLE_AUTH based environment, so that the host where the mount is does not need to have all the users that are defined and used on HDFS.