[ZEPPELIN-5744] Allow NoteManager for concurrent operation

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.9.0, 0.10.0, 0.10.1
• Fix Version/s: 0.11.0
• Assignee: Sun Shun
• Reporter: Sun Shun
• Created: 28/May/22 02:08
• Updated: 19/Jun/23 17:33
• Resolved: 19/Jun/23 17:33

Description

When multi users perform some notebook/folder operation, like rename or move, some notebooks become not accessible from zeppelin page, while they are still existing on the HDFS, and only resort to restart Zeppelin daemon to solve the problem.

Some unit test is created to simulate the concurrent request scenario and reproduce the issue successfully, including the operations of saveNote, moveNote, moveFolder and removeNote.

Accordingly, some changes are made to ensure thread safety of note manager operation, so that the note or folder info will not be lost, after which the unit test gets passed. A PR will submitted later.

Issue Links

• links to: GitHub Pull Request #4374