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https://issues.apache.org/jira/browse/SPARK-61185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-61185.
----------------------------------
    Resolution: Fixed

Issue resolved by pull request 363
[https://github.com/apache/spark-connect-rust/pull/363]

> Remove each registration of a streaming query listener exactly once, also of 
> a listener added twice or removed through another session, in the Python 
> client as PySpark does
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-61185
>                 URL: https://issues.apache.org/jira/browse/SPARK-61185
>             Project: Spark
>          Issue Type: Bug
>          Components: Connect
>    Affects Versions: connect-rust-4.3.0
>            Reporter: Hyukjin Kwon
>            Assignee: Hyukjin Kwon
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: connect-rust-4.3.0
>
>
> The Python client keeps one registration id per listener object, so 
> removeListener removes only one entry of the listener bus of the session and 
> forgets the id even when that bus never had the listener.
> Repro: add the same listener twice, then remove it twice; the bus keeps one 
> entry and the listener keeps getting query events.
> Also: addListener on spark.streams, then removeListener on spark2.streams 
> (another session) drops the id, so the later spark.streams.removeListener is 
> a no-op.
> PySpark removes one entry per removeListener from the bus of the session, so 
> both cases end with an empty bus and no events.



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