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https://issues.apache.org/jira/browse/HADOOP-7973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185866#comment-13185866
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Daryn Sharp commented on HADOOP-7973:
-------------------------------------
If we tell users don't call {{close()}} then I think that leaves them in an
unfortunate predicament of conditionalizing all of the closes. Ie. If the
cache is on, then never call {{close()}}; if the cache is off, then you must
call {{close()}} to prevent resources from leaking. If true, that seems to be
a compelling argument to make {{close()}} be smart.
> 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.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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