GitHub user WangTaoTheTonic opened a pull request:

    [FLINK-5818][Security]change checkpoint dir permission to 700

    Now checkpoint directory is made w/o specified permission, so it is easy 
for another user to delete or read files under it, which will cause restore 
failure or information leak.
    It's better to lower it down to 700.
    - [x] Tests & Build
      - Functionality added by the pull request is covered by tests

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    This closes #3335
commit 02eef87dc2bfaa6737efad023916898719d34fe2
Author: WangTaoTheTonic <>
Date:   2017-02-16T11:24:43Z

    change checkpoint dir permission to 700


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