[jira] [Created] (FLINK-5019) Proper isRestored result for tasks that did not write state

[Shang Yuanchun (Jira)]

Stefan Richter created FLINK-5019:
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             Summary: Proper isRestored result for tasks that did not write state
                 Key: FLINK-5019
                 URL: https://issues.apache.org/jira/browse/FLINK-5019
             Project: Flink
          Issue Type: Bug
            Reporter: Stefan Richter
            Assignee: Stefan Richter


When a subtask is restored from a checkpoint that does not contain any state (e.g. because the subtask did not write state in the previous run), the result of {{StateInitializationContext::isRestored}} will incorrectly return false.

We should ensure that empty state is somehow reflected in a checkpoint and return true on restore, independent from the presence of state.



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