GitHub user ueshin opened a pull request:

    [SPARK-17985][CORE] Bump commons-lang3 version to 3.5.

    ## What changes were proposed in this pull request?
    `SerializationUtils.clone()` of commons-lang3 (<3.5) has a bug that breaks 
thread safety, which gets stack sometimes caused by race condition of 
initializing hash map.
    ## How was this patch tested?
    Existing tests.

You can merge this pull request into a Git repository by running:

    $ git pull issues/SPARK-17985

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #15525
commit f318dffd4137c20bdc67ac054e345d55703d96de
Author: Takuya UESHIN <>
Date:   2016-10-18T02:42:14Z

    Bump commons-lang3 version to 3.5.


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