Github user witgo commented on the pull request: https://github.com/apache/spark/pull/828#issuecomment-43589674 [The code](https://github.com/witgo/spark/commit/6d7f2408a40bf4bb2889bf66fa61bced782cdefc#diff-2b593e0b4bd6eddab37f04968baa826c) will make the checkpoint directory larger and is not clear .
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