Hi *, I already looked into this issue and created a PR that hopefully fixes the problem. Unfortunately I have not been able to reproduce the bug, but could track down a possible cause for this. See the PR for an explanation: https://github.com/apache/spark/pull/1358
If anyone who these experienced problems could check out the PR and verify the fix, it would be a great help. It the fix does not solve the problem, please let me know. Cheers, Dario
