[jira] [Created] (FLINK-20636) Require unaligned checkpoints to be disabled in StateFun applications

[Shang Yuanchun (Jira)]

Tzu-Li (Gordon) Tai created FLINK-20636:
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             Summary: Require unaligned checkpoints to be disabled in StateFun applications
                 Key: FLINK-20636
                 URL: https://issues.apache.org/jira/browse/FLINK-20636
             Project: Flink
          Issue Type: Task
          Components: Stateful Functions
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai
             Fix For: statefun-2.2.2


Due to how StateFun has feedback loops, with unaligned checkpoints a function dispatcher operator may receive a feedback checkpoint barrier (from other parallel subtasks that process the checkpoint barrier first) before it receives its own checkpoint barrier.

We need to further investigate how to properly support unaligned checkpointing in StateFun.
For the time being, we should strictly require aligned checkpointing for StateFun apps.



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