Github user dragos commented on the pull request:
https://github.com/apache/spark/pull/4984#issuecomment-102630662
It's only a hunch so far, but I think that default containerization in
Mesos is deleting all files written by Spark executors (under `/tmp`) as soon
as the executor is killed. At least, the directory disappears the moment the
Mesos task is killed.
I'll see if I can use the [shared filesystem isolator][cont] to map `/tmp`
between the host and Spark executors.
[cont]: http://mesos.apache.org/documentation/latest/mesos-containerizer/
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