Haohui Mai created HDFS-6480:
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Summary: Move waitForReady() from FSDirectory to FSNamesystem
Key: HDFS-6480
URL: https://issues.apache.org/jira/browse/HDFS-6480
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Haohui Mai
Assignee: Haohui Mai
Attachments: HDFS-6480.000.patch
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}}.
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