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From "Daryn Sharp (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8131) FsShell put doesn't correctly handle a non-existent dir
Date Mon, 26 Mar 2012 14:34:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238433#comment-13238433

Daryn Sharp commented on HADOOP-8131:

@Eli: I believe the auto-create was removed with the earlier redesign but crept back in later
so I didn't view this particular jira as incompatible.  Since the goal has been to mimic the
real shell, this non-posix "feature" was intentionally (again?) removed to solve this jira.

It also resolves the inconsistency between single source vs. multiple sources copies.  Single
source copy would formerly auto-create non-existent dirs, but a multi-source copy fails if
the target isn't an existing dir.  Ergo, copying a glob to a non-existent path was indeterminate
depending on the number of glob matches: 1 match auto-created, more than 1 match failed.

Internally, we found the impact to be minimal (a single mkdir), so we favored retaining the
posix semantics of copy.  Some relied on the auto-create because mkdir failed if the directory
already exists, thus HADOOP-8175 added a -p flag.

If you feel strongly on restoring the former non-posix behavior and single/multi source inconsistency,
I can look into doing so.
> FsShell put doesn't correctly handle a non-existent dir
> -------------------------------------------------------
>                 Key: HADOOP-8131
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8131
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.23.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>             Fix For: 0.23.2
>         Attachments: HADOOP-8131.patch, HADOOP-8131.patch, HADOOP-8131.patch, HADOOP-8131.patch
> {noformat}
> $ hadoop fs -ls
> ls: `.': No such file or directory
> $ hadoop fs -put file
> $ hadoop fs -ls
> Found 1 items
> -rw-r--r--   1 kihwal supergroup       2076 2011-11-04 10:37 .._COPYING_
> {noformat}

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