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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-12363) Hadoop binary distributions contain many copies of the same jars
Date Sat, 29 Aug 2015 16:44:46 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer resolved HADOOP-12363.
---------------------------------------
       Resolution: Duplicate
    Fix Version/s: HADOOP-10115

Closing as a dupe.

> Hadoop binary distributions contain many copies of the same jars
> ----------------------------------------------------------------
>
>                 Key: HADOOP-12363
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12363
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Benoit Sigoure
>            Priority: Minor
>             Fix For: HADOOP-10115
>
>
> [I noticed this 2 years ago|https://twitter.com/tsunanet/status/384917643162972161] but
this is bugging me again so I'm finally filing a bug ;o
> The Hadoop binary distribution is insanely redundant.  Over 80% of the size of the ~200MB
tarballs distributed both by Apache upstream and by Cloudera is made of duplicate files.
> Back when I was complaining about CDH 4.4.0, the Hadoop tarball contained [3477 duplicate
files, some of which had 98 copies in the tarball|http://tsunanet.net/~tsuna/cdh440-dup-files.txt]!
> Now I'm looking at the official {{hadoop-2.7.1.tar.gz}} and I'm seeing 7 copies of {{jackson-mapper-asl-1.9.13.jar}},
{{jersey-server-1.9.jar}}, {{protobuf-java-2.5.0.jar}}, etc, 6 copies of {{guava-11.0.2.jar}},
{{xz-1.0.jar}}, {{commons-logging-1.1.3.jar}}, etc, 5 copies of {{snappy-java-1.0.4.1.jar}},
etc etc etc.  All in all there are well over 200 files that appear at least twice in the tarball,
and that account for 118MB worth of files that could just be replaced with a symlink (assuming
you don't want to change the structure of the tarball at all).
> This is really not necessary :)
> Can we fix the distribution?  I'm sure Cloudera and others will fix their distributions
as well once this is fixed upstream (their distros exhibit a substantially more acute version
of this problem).



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