[jira] [Created] (HADOOP-11680) Deduplicate jars in convenience binary distribution

["Sean Busbey (JIRA)" <ji...@apache.org>]

Sean Busbey created HADOOP-11680:
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             Summary: Deduplicate jars in convenience binary distribution
                 Key: HADOOP-11680
                 URL: https://issues.apache.org/jira/browse/HADOOP-11680
             Project: Hadoop Common
          Issue Type: Improvement
          Components: build
            Reporter: Sean Busbey
            Assignee: Sean Busbey


Pulled from discussion on HADOOP-11656 Colin wrote:

{quote}
bq. Andrew wrote: One additional note related to this, we can spend a lot of time right now distributing 100s of MBs of jar dependencies when launching a YARN job. Maybe this is ameliorated by the new shared distributed cache, but I've heard this come up quite a bit as a complaint. If we could meaningfully slim down our client, it could lead to a nice win.

I'm frustrated that nobody responded to my earlier suggestion that we de-duplicate jars. This would drastically reduce the size of our install, and without rearchitecting anything.
In fact I was so frustrated that I decided to write a program to do it myself and measure the delta. Here it is:

Before:
{code}
du -h /h
249M    /h
{code}
After:
{code}
du -h /h
140M    /h
{code}

Seems like deduplicating jars would be a much better project than splitting into a client jar, if we really cared about this.
<snip>
{quote}



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