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https://issues.apache.org/jira/browse/HDFS-1462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924094#action_12924094
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Jitendra Nath Pandey commented on HDFS-1462:
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This patch removes the references to namesystem object from FSEditlog, which is 
a good thing. 
FSEditlog still refers to FSNamesystem.LOG, if LOG object could be passed as a 
parameter, we could remove all references to FSNamesystem from FSEditlog.

> Refactor edit log loading to a separate class from edit log writing
> -------------------------------------------------------------------
>
>                 Key: HDFS-1462
>                 URL: https://issues.apache.org/jira/browse/HDFS-1462
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-1462.txt, hdfs-1462.txt, hdfs-1462.txt
>
>
> Before the major work in HDFS-1073, I'd like to do this refactor to clean up 
> the monster FSEditLog class. We can separate all the functions that take of 
> loading edits into an FSN from the functions that take care of writing edits, 
> rolling, etc.

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