isunjin commented on issue #6684:     [FLINK-10205] Batch Job: InputSplit Fault 
tolerant for DataSource…
URL: https://github.com/apache/flink/pull/6684#issuecomment-430451645
 
 
   @tillrohrmann i think the splits need be strictly consumed by failed job. 
otherwise the logic to make data consistent (make sure split be consumed 
exactly once) is complicated. Streaming is good at this as it internally treat 
split as a record, the framework will make sure every split (record) be 
processed exactly once.  

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