Github user rxin commented on the pull request:
https://github.com/apache/spark/pull/1890#issuecomment-52862331
Thanks, @GrahamDennis for updating this. You should get a medal for making
it super easy to reproduce problems!
How does this fix work on YARN / Mesos? As I understand, you basically make
the standalone cluster mgr worker itself download the initial user jars.
An alternative fix is to not initialize the data serializer until the first
time updateDependencies is called.
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