Github user liancheng commented on the pull request:
https://github.com/apache/spark/pull/2161#issuecomment-53614103
@tnachen I tested this PR in a local single node Mesos cluster, and
verified the executor side Spark home directory problem by setting
`SPARK_PRINT_LAUNCH_COMMAND` and check the command line from Mesos log. I
pasted the printed command line
[here](https://gist.githubusercontent.com/liancheng/c7a6a86a633b29fa2fc7/raw/a4556bd04142b9957bd287a64d9abecf15e9dfaf/mesos-log).
We may see that all classpaths points to the executor sandbox.
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