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https://issues.apache.org/jira/browse/HADOOP-3400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598755#action_12598755
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dhruba borthakur commented on HADOOP-3400:
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Responding to Steve' comments: I agree that deleteOnExit helps only if the JVM
shuts down cleanly and the filesystem is visible. A big percentage of our use
cases actually fall in this category. I would like the deleteOnExit API to be
part of the 0.18 release and following that, start discussion on the
removeAfter() API proposed by Doug.
> Facilitate creation of temporary files in HDFS
> ----------------------------------------------
>
> Key: HADOOP-3400
> URL: https://issues.apache.org/jira/browse/HADOOP-3400
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: deleteOnExit.patch, deleteOnExit.patch,
> deleteOnExit.patch
>
>
> There are a set of applications that use HDFS to create temporary files. The
> application would ideally like these files to be automatically deleted when
> the application process exits. This is similar to the File.deleteOnExit() in
> the Java API.
> One proposal is to add a new method in FileSystem
> public void deleteOnExit(Path)
> This API requests that the file or directory denoted by this abstract
> pathname be deleted when the virtual machine terminates. Deletion will be
> attempted only for normal termination of the virtual machine, as defined by
> the Java Language Specification. Once deletion has been requested, it is not
> possible to cancel the request. This method should therefore be used with
> care.
> This method can be implemented entirely in the client side code, e.g.
> FileSystem.java will keep a cache of all the pathnames specified by the above
> API. FileSystem.close will invoke delete() on all the pathnames found in the
> cache.
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