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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8690) Shell may remove a file without going to trash even if skipTrash is not enabled
Date Mon, 13 Aug 2012 20:06:38 GMT
Eli Collins created HADOOP-8690:
-----------------------------------

             Summary: Shell may remove a file without going to trash even if skipTrash is
not enabled
                 Key: HADOOP-8690
                 URL: https://issues.apache.org/jira/browse/HADOOP-8690
             Project: Hadoop Common
          Issue Type: Bug
    Affects Versions: 2.0.0-alpha
            Reporter: Eli Collins
            Priority: Minor


Delete.java contains the following comment:

{noformat}
// TODO: if the user wants the trash to be used but there is any
// problem (ie. creating the trash dir, moving the item to be deleted,
// etc), then the path will just be deleted because moveToTrash returns
// false and it falls thru to fs.delete.  this doesn't seem right
{noformat}

If Trash#moveToAppropriateTrash returns false FsShell will delete the path even if skipTrash
is not enabled. The comment isn't quite right as some of these failure scenarios result in
exceptions not a false return value, and in the case of an exception we don't unconditionally
delete the path. TrashPolicy#moveToTrash states that it only returns false if the item is
already in the trash or trash is disabled, and the expected behavior for these cases is to
just delete the path. However TrashPolicyDefault#moveToTrash also returns false if there's
a problem creating the trash directory, so for this case I don't think we should throw an
exception rather than return false.

I also question the behavior of just deleting when the item is already in the trash as it
may have changed since previously put in the trash and not been checkpointed yet. Seems like
in this case we should move it to trash but with a file name suffix.

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