Facilitate creation of temporary files in HDFS
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Key: HADOOP-3400
URL: https://issues.apache.org/jira/browse/HADOOP-3400
Project: Hadoop Core
Issue Type: Improvement
Reporter: dhruba borthakur
Assignee: dhruba borthakur
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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