Github user vanzin commented on the pull request: https://github.com/apache/spark/pull/8477#issuecomment-135548614 I'm not familiar with how this data is used by the streaming backend, but it looks odd to be manually reloading it from a checkpoint. In client mode, AM restarts do not affect the driver. In cluster mode, the app id is the same, but the attempt id changes; and those will be re-populated anyway when the SparkContext for the app is initialized by the new AM process.
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