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https://issues.apache.org/jira/browse/HDFS-15106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014491#comment-17014491
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Ayush Saxena commented on HDFS-15106:
-------------------------------------

Seems like there is some resistance for code cleanup JIRA's [in the mail 
lists|https://lists.apache.org/thread.html/r1087aec2a2794bacb4bac5c261a1e9715b3e86d999ef6efe711cf4d6%40%3Chdfs-dev.hadoop.apache.org%3E]

> Remove unused code from FSDirConcatOp.
> --------------------------------------
>
>                 Key: HDFS-15106
>                 URL: https://issues.apache.org/jira/browse/HDFS-15106
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Jinglun
>            Assignee: Jinglun
>            Priority: Trivial
>         Attachments: HDFS-15106.001.patch
>
>
> I was reading code about rpc concat()  and found an unused variable named 
> count. It was originally used to compute the namespace delta. Now we use 
> QuotaCounts deltas so it becomes useless.  To be clear we should remove it.



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