Yuan Mei

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Please also update the title and description correspondingly.

I do not have other comments, please update the commit msg, and I will merge the code.

Thanks for fixing up this @chenyuzhi459

> Got it, thanks. My concern is that probably we should fix the error handling in `CheckpointFailureManager`, instead of `mkdirs` call: > > ``` > case FINALIZE_CHECKPOINT_FAILURE: > // ignore...