liuxian created SPARK-23391:
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Summary: It may lead to overflow for some integer multiplication
Key: SPARK-23391
URL: https://issues.apache.org/jira/browse/SPARK-23391
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.3.0
Reporter: liuxian
In the {{getBlockData}},{{blockId.reduceId}} is the {{Int}} type, when it is
greater than 2^28, {{blockId.reduceId*8}} will overflow.
In the _decompress0, len_ and _unitSize are {{Int}} type,_so _len * unitSize_
may lead to overflow
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