[HDFS-16011] HDFS: Support viewfs nested mount

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.2.2, 3.3.1, 3.4.0
• Component/s: hdfs, viewfs
• Labels: pull-request-available
• Assignee: Xiangyi Zhu
• Reporter: Xiangyi Zhu
• Created: 07/May/21 11:58
• Updated: 15/May/21 10:40

Description

The current viewfs does not support nested mount points. The current viewfs does not support nested mount points. 

E.g:

    1./home/ => /home/

    2./home/work => /home/work

If mount point 1 is loaded, mount point 2 cannot be added, and the following exception will be thrown when loading 2.

throw new FileAlreadyExistsException("Path " + nextInode.fullPath +
 " already exists as link");

Issue Links

• links to: GitHub Pull Request #2987