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From "Andy Isaacson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9193) hadoop script can inadvertently expand wildcard arguments when delegating to hdfs script
Date Wed, 09 Jan 2013 22:26:13 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andy Isaacson updated HADOOP-9193:
----------------------------------

    Description: 
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:
{code}
hadoop fs -ls /tmp/\*
hadoop dfs -ls /tmp/\*
{code}
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.


  was:
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.


    
> 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:
> {code}
> hadoop fs -ls /tmp/\*
> hadoop dfs -ls /tmp/\*
> {code}
> 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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