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https://issues.apache.org/jira/browse/SPARK-26806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cheng Lian updated SPARK-26806:
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Reporter: Cheng Lian (was: liancheng)
> EventTimeStats.merge doesn't handle "zero.merge(zero)" correctly
> ----------------------------------------------------------------
>
> Key: SPARK-26806
> URL: https://issues.apache.org/jira/browse/SPARK-26806
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.2.1, 2.2.2, 2.2.3, 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.4.0
> Reporter: Cheng Lian
> Assignee: Shixiong Zhu
> Priority: Major
> Fix For: 2.2.4, 2.3.3, 2.4.1, 3.0.0
>
>
> Right now, EventTimeStats.merge doesn't handle "zero.merge(zero)". This will
> make "avg" become "NaN". And whatever gets merged with the result of
> "zero.merge(zero)", "avg" will still be "NaN". Then finally, "NaN".toLong
> will return "0" and the user will see the following incorrect report:
> {code}
> "eventTime" : {
> "avg" : "1970-01-01T00:00:00.000Z",
> "max" : "2019-01-31T12:57:00.000Z",
> "min" : "2019-01-30T18:44:04.000Z",
> "watermark" : "1970-01-01T00:00:00.000Z"
> }
> {code}
> This issue was reported by [~liancheng]
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