[HDFS-6480] Move waitForReady() from FSDirectory to FSNamesystem

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.5.0
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Haohui Mai
• Reporter: Haohui Mai
• Created: 03/Jun/14 00:46
• Updated: 15/Aug/14 05:41
• Resolved: 19/Jun/14 04:18

Description

Currently FSDirectory implements a barrier in waitForReady() / setReady() so that it only serve requests once the FSImage is fully loaded.

As a part of the effort to evolve FSDirectory to a class which focuses on implementing the data structure of the namespace, this jira proposes to move the barrier one level higher to FSNamesystem.