liuxian created SPARK-23744:
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Summary: Memory leak in ReadableChannelFileRegion
Key: SPARK-23744
URL: https://issues.apache.org/jira/browse/SPARK-23744
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.3.0
Reporter: liuxian
In the class `_ReadableChannelFileRegion_`, the `buffer` is direct memory, we
should modify `_deallocate_` to free it
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