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https://issues.apache.org/jira/browse/HDFS-7416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14230334#comment-14230334
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Haohui Mai commented on HDFS-7416:
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This jira also separates different functionalities in {{FSNameSystem}} /
{{FSDirectory}} into different classes. Today {{FSNameSystem}} has around
8000~9000 lines of code. This jira proposes to separate these 8000~9000 lines
of code to different classes based for better maintainability. I also plan to
move the separated classes under a new package name (e.g.
{{o.a.h.hdfs.namenode.namespace}}) once the initial refactoring is finished.
> Revisit the abstraction between NameNodeRpcServer, FSNameSystem and
> FSDirectory
> -------------------------------------------------------------------------------
>
> Key: HDFS-7416
> URL: https://issues.apache.org/jira/browse/HDFS-7416
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> {{NameNodeRpcServer}}, {{FSNameSystem}} and {{FSDirectory}} implement the
> namespace of the NN. In the current implementation the boundary of these
> classes are not fully clear.
> This jira tracks the efforts of clarifying the boundaries between these three
> classes so that they can be more easily maintained in the long term.
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