[jira] [Created] (FLINK-21080) Identify JobVertex containing legacy source operators and abort checkpoint with legacy source operators partially finished

[Shang Yuanchun (Jira)]

Yun Gao created FLINK-21080:
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             Summary: Identify JobVertex containing legacy source operators and abort checkpoint with legacy source operators partially finished
                 Key: FLINK-21080
                 URL: https://issues.apache.org/jira/browse/FLINK-21080
             Project: Flink
          Issue Type: Sub-task
            Reporter: Yun Gao


Most legacy source operators would record the offset for each partitions, and after recovery it would read from the recorded offset. If before a checkpoint some subtasks are finished, the corresponding partition offsets would be deserted in the checkpoint. Then if the job recover with this checkpoint, the legacy source would re-discovery all the partitions and for those finished tasks, the legacy source would re-read them since their offsets are not recorded. 

Therefore, we would like to fail the checkpoint if some legacy source operators have part of subtasks finished. 



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