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https://issues.apache.org/jira/browse/SPARK-26662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-26662.
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Resolution: Won't Fix
> Dispose off-heap memory when MemoryStore is cleared
> ---------------------------------------------------
>
> Key: SPARK-26662
> URL: https://issues.apache.org/jira/browse/SPARK-26662
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: SongYadong
> Priority: Minor
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> If buffer in *MemoryStore*'s *SerializedMemoryEntry* is allocated off-heap,
> current *clear()* action doesn't dispose them. These off-heap memory, though,
> will be freed when process ends, but for application that need to stop and
> restart *SparkContext* serveral times, this may cause some kind of off-heap
> memory leak.
> It may be better to dispose off-heap memory by itself when clearing
> *MemoryStore*.
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