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https://issues.apache.org/jira/browse/HADOOP-9193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13549053#comment-13549053
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Jason Lowe commented on HADOOP-9193:
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Note that this may be somewhat moot if HDFS-2745 is committed and no other
delegated commands are expected to take wildcard arguments or other types of
arguments that could be accidentally interpreted by the shell during the exec.
> hadoop script can inadvertently expand wildcard arguments when delegating to
> hdfs script
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-9193
> URL: https://issues.apache.org/jira/browse/HADOOP-9193
> Project: Hadoop Common
> Issue Type: Bug
> Components: scripts
> Affects Versions: 2.0.2-alpha, 0.23.5
> Reporter: Jason Lowe
> Priority: Minor
>
> The hadoop front-end script will print a deprecation warning and defer to the
> hdfs front-end script for certain commands, like fsck, dfs. If a wildcard
> appears as an argument then it can be inadvertently expanded by the shell to
> match a local filesystem path before being sent to the hdfs script, which can
> be very confusing to the end user.
> For example, the following two commands usually perform very different
> things, even though they should be equivalent:
> hadoop fs -ls /tmp/\*
> hadoop dfs -ls /tmp/\*
> The former lists everything in the default filesystem under /tmp, while the
> latter expands /tmp/\* into everything in the *local* filesystem under /tmp
> and passes those as arguments to try to list in the default filesystem.
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