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Posted to issues@spark.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2019/02/01 00:01:00 UTC

[jira] [Created] (SPARK-26806) EventTimeStats.merge doesn't handle "zero.merge(zero)" correctly

Shixiong Zhu created SPARK-26806:
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             Summary: 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: 2.4.0
            Reporter: Shixiong Zhu
            Assignee: Shixiong Zhu


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}



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