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Posted to issues@spark.apache.org by "SongYadong (JIRA)" <ji...@apache.org> on 2019/01/18 13:13:00 UTC

[jira] [Created] (SPARK-26662) Dispose off-heap memory when MemoryStore is cleared

SongYadong created SPARK-26662:
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             Summary: 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


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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