GitHub user SaintBacchus opened a pull request:

    https://github.com/apache/spark/pull/8942

    [SPARK-10473][YARN]Login again in the driver to avoid the events lossing.

    As discussed  with @tgravescs and @harishreedharan  at the 
[8867](https://github.com/apache/spark/pull/8867#issuecomment-142970395), if 
the `SaslRpcClient`'s authentication is *TOKEN*, it will have the `token 
expired` exception.
     But if the authentication is *KERBEROS*`, it will renew the token 
automatically.
    This modify can change to authentication  from *TOKEN * into *KERBEROS *.

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

    $ git pull https://github.com/SaintBacchus/spark SPARK-10473

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

    https://github.com/apache/spark/pull/8942.patch

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

    This closes #8942
    
----
commit fd1f73531514865ecf0b632af628650b0b6f1983
Author: huangzhaowei <[email protected]>
Date:   2015-09-30T02:03:00Z

    [SPARK-10473][YARN]Login again in the driver to avoid the events lossing.

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