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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12747) support wildcard in libjars argument
Date Sat, 02 Jul 2016 00:07:11 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15359859#comment-15359859
] 

Sangjin Lee commented on HADOOP-12747:
--------------------------------------

For some reason, jenkins didn't post the results. It's here: https://builds.apache.org/job/PreCommit-HADOOP-Build/9917/console

The unit test failure is the only -1 on the result, and it is unrelated to this patch. Checkstyle
is -0 because a unit test class that I touched is lacking javadoc at the class level. I think
it is OK to not worry about that one.

Regarding the javadoc issue you mentioned Daniel, jenkins returned +1 because javadoc for
private methods/fields is not required and they don't generate warnings. It is more for information.
Would you prefer that I fix them still? Let me know... Thanks!

> support wildcard in libjars argument
> ------------------------------------
>
>                 Key: HADOOP-12747
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12747
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: util
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>         Attachments: HADOOP-12747.01.patch, HADOOP-12747.02.patch, HADOOP-12747.03.patch,
HADOOP-12747.04.patch, HADOOP-12747.05.patch, HADOOP-12747.06.patch
>
>
> There is a problem when a user job adds too many dependency jars in their command line.
The HADOOP_CLASSPATH part can be addressed, including using wildcards (\*). But the same cannot
be done with the -libjars argument. Today it takes only fully specified file paths.
> We may want to consider supporting wildcards as a way to help users in this situation.
The idea is to handle it the same way the JVM does it: \* expands to the list of jars in that
directory. It does not traverse into any child directory.
> Also, it probably would be a good idea to do it only for libjars (i.e. don't do it for
-files and -archives).



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