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https://issues.apache.org/jira/browse/HADOOP-17267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-17267.
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Fix Version/s: 3.3.1
Resolution: Fixed
+1, merged to trunk. Thanks!
> Add debug-level logs in Filesystem#close
> ----------------------------------------
>
> Key: HADOOP-17267
> URL: https://issues.apache.org/jira/browse/HADOOP-17267
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 3.3.0
> Reporter: Karen Coppage
> Assignee: Karen Coppage
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.3.1
>
> Time Spent: 5h
> Remaining Estimate: 0h
>
> HDFS reuses the same cached FileSystem object across the file system. If the
> client calls FileSystem.close(), closeAllForUgi(), or closeAll() (if it
> applies to the instance) anywhere in the system it purges the cache of that
> FS instance, and trying to use the instance results in an IOException:
> FileSystem closed.
> It would be a great help to clients to see where and when a given FS instance
> was closed. I.e. in close(), closeAllForUgi(), or closeAll(), it would be
> great to see a DEBUG-level log of
> * calling method name, class, file name/line number
> * FileSystem object's identity hash (FileSystem.close() only)
> For the full calling stack, turn on TRACE logging.
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