Github user zuotingbing commented on the issue: https://github.com/apache/spark/pull/19989 we can find the cache size of FileSystem `deleteOnExit` will keep increasing. [ ![mshot](https://user-images.githubusercontent.com/24823338/34095036-d1fcc408-e40a-11e7-9599-2acdd96da2d9.png) ](url)
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