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https://issues.apache.org/jira/browse/HDFS-17917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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KWON BYUNGCHANG updated HDFS-17917:
-----------------------------------
    Description: 
When deleting empty directory, empty list is added to markedDeleteQueue.

I think this is unnecessary. and markedDeleteQueue.size() is O( n ) operation, 
so it is costly.

  was:
When deleting empty directory, empty list is added to markedDeleteQueue.

I think this is unnecessary. and markedDeleteQueue.size() is {{O(n)}} 
operation, so it is costly.


> Fix empty block list enqueue in markedDeleteQueue
> -------------------------------------------------
>
>                 Key: HDFS-17917
>                 URL: https://issues.apache.org/jira/browse/HDFS-17917
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: KWON BYUNGCHANG
>            Priority: Minor
>         Attachments: HDFS-17917.001.patch, HDFS-17917.002.patch
>
>
> When deleting empty directory, empty list is added to markedDeleteQueue.
> I think this is unnecessary. and markedDeleteQueue.size() is O( n ) 
> operation, so it is costly.



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