[jira] [Updated] (SPARK-19378) StateOperator metrics should still return the total number of rows in state even if there was no data for a trigger

["Xiao Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-19378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li updated SPARK-19378:
----------------------------
    Fix Version/s:     (was: 3.0.0)
                   2.2.0

> 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
>            Priority: Major
>             Fix For: 2.1.1, 2.2.0
>
>
> 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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