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Posted to common-dev@hadoop.apache.org by "Joe Kelley (JIRA)" <ji...@apache.org> on 2014/01/29 23:16:14 UTC

[jira] [Created] (HADOOP-10309) S3 block filesystem should more aggressively delete temporary files

Joe Kelley created HADOOP-10309:
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             Summary: S3 block filesystem should more aggressively delete temporary files
                 Key: HADOOP-10309
                 URL: https://issues.apache.org/jira/browse/HADOOP-10309
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs/s3
            Reporter: Joe Kelley
            Priority: Minor


The S3 FileSystem reading implementation downloads block files into a configurable temporary directory. deleteOnExit() is called on these files, so they are deleted when the JVM exits.

However, JVM reuse can lead to JVMs that stick around for a very long time. This can cause these temporary files to build up indefinitely and, in the worst case, fill up the local directory.

After a block file has been read, there is no reason to keep it around. It should be deleted.

Writing to the S3 FileSystem already has this behavior; after a temporary block file is written and uploaded to S3, it is deleted immediately; there is no need to wait for the JVM to exit.



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