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https://issues.apache.org/jira/browse/HADOOP-7973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13189502#comment-13189502
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Kihwal Lee commented on HADOOP-7973:
------------------------------------

It's probably HADOOP-4655.
                
> DistributedFileSystem close has severe consequences
> ---------------------------------------------------
>
>                 Key: HADOOP-7973
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7973
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 1.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: HADOOP-7973-2.patch, HADOOP-7973-3.patch, 
> HADOOP-7973-4.patch, HADOOP-7973.patch
>
>
> The way {{FileSystem#close}} works is very problematic.  Since the 
> {{FileSystems}} are cached, any {{close}} by any caller will cause problems 
> for every other reference to it.  Will add more detail in the comments.

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