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https://issues.apache.org/jira/browse/SPARK-19378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tathagata Das resolved SPARK-19378.
-----------------------------------
Resolution: Fixed
Fix Version/s: 3.0.0
2.1.1
Issue resolved by pull request 16716
[https://github.com/apache/spark/pull/16716]
> StateOperator metrics should still return the total number of rows in state
> even if there was no data for a trigger
> -------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-19378
> URL: https://issues.apache.org/jira/browse/SPARK-19378
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.1.0
> Reporter: Burak Yavuz
> Assignee: Burak Yavuz
> Fix For: 2.1.1, 3.0.0
>
>
> If you have a StreamingDataFrame with an aggregation, we report a metric
> called stateOperators which consists of a list of data points per aggregation
> for our query (With Spark 2.1, only one aggregation is supported).
> These data points report:
> - numUpdatedStateRows
> - numTotalStateRows
> If a trigger had no data - therefore was not fired - we return 0 data points,
> however we should actually return a data point with
> - numTotalStateRows: numTotalStateRows in lastExecution
> - numUpdatedStateRows: 0
> This also affects eventTime statistics. We should still provide the min, max,
> avg even through the data didn't change.
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