shiwuliang created FLINK-12299:
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Summary: ExecutionConfig#setAutoWatermarkInterval should check
param(interval should not less than zero)
Key: FLINK-12299
URL: https://issues.apache.org/jira/browse/FLINK-12299
Project: Flink
Issue Type: Improvement
Reporter: shiwuliang
In any scenario, `autoWatermarkInterval` should not be less than or equal to
zero.
First of all, this does not correspond to the meaning of
`autoWatermarkInterval`.
Second, in the case where `autoWatermarkInterval` is less than 0, we will not
be able to register ourselves in
`TimestampsAndPeriodicWatermarksOperator#open`, which will result in the water
level of this stream being kept at the lowest level.
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