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https://issues.apache.org/jira/browse/SPARK-30494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-30494.
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Fix Version/s: 3.0.0
Assignee: Lantao Jin
Resolution: Fixed
This is resolved via https://github.com/apache/spark/pull/27185
> Duplicates cached RDD when create or replace an existing view
> -------------------------------------------------------------
>
> Key: SPARK-30494
> URL: https://issues.apache.org/jira/browse/SPARK-30494
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.2, 2.1.3, 2.2.3, 2.3.4, 2.4.5, 3.0.0
> Reporter: Lantao Jin
> Assignee: Lantao Jin
> Priority: Major
> Fix For: 3.0.0
>
>
> We can reproduce by below commands:
> {code}
> beeline> create or replace temporary view temp1 as select 1
> beeline> cache table temp1
> beeline> create or replace temporary view temp1 as select 1, 2
> beeline> cache table temp1
> {code}
> The cached RDD for plan "select 1" stays in memory forever until the session
> close. This cached data cannot be used since the view temp1 has been replaced
> by another plan. It's a memory leak.
> assert(spark.sharedState.cacheManager.lookupCachedData(sql("select 1,
> 2")).isDefined)
> assert(spark.sharedState.cacheManager.lookupCachedData(sql("select
> 1")).isDefined)
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