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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13611) FileSystem/s3a processDeleteOnExit to skip the exists() check
Date Wed, 14 Sep 2016 13:49:20 GMT
Steve Loughran created HADOOP-13611:

             Summary: FileSystem/s3a processDeleteOnExit to skip the exists() check
                 Key: HADOOP-13611
                 URL: https://issues.apache.org/jira/browse/HADOOP-13611
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs, fs/s3
    Affects Versions: 2.7.3
            Reporter: Steve Loughran
            Priority: Minor

If you look at {{FileSystem.processDeleteOnExit()}}, it does an exists() check for each entry,
before calling delete().

That exists() check is superfluous; on s3 it add an extra 1-4 HTTP GETs

This could be fixed with a subclass in s3a to avoid it, but as the call is superfluous in
*all* filesystems, it could be removed in {{FileSystem}} and so picked up by all object stores.

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