Aljoscha Krettek created FLINK-19837:
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             Summary: Don't emit intermediate watermarks watermark operators in 
BATCH execution mode
                 Key: FLINK-19837
                 URL: https://issues.apache.org/jira/browse/FLINK-19837
             Project: Flink
          Issue Type: Sub-task
            Reporter: Aljoscha Krettek


Currently, both sources and watermark/timestamp operators can emit watermarks 
that we don't really need. We only need a final watermark in BATCH execution 
mode.



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