liuxian created SPARK-23989:
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Summary: When using `SortShuffleWriter`, the data will be
overwritten
Key: SPARK-23989
URL: https://issues.apache.org/jira/browse/SPARK-23989
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.3.0
Reporter: liuxian
{color:#333333}When using `SortShuffleWriter`, we only insert
'{color}{color:#cc7832}AnyRef{color}{color:#333333}' into '{color}
PartitionedAppendOnlyMap{color:#333333}' or
'{color}PartitionedPairBuffer{color:#333333}'.{color}
{color:#333333}For this function:{color}
{color:#cc7832}override def {color}{color:#ffc66d}write{color}(records:
{color:#4e807d}Iterator{color}[Product2[{color:#4e807d}K{color}{color:#cc7832},
{color}{color:#4e807d}V{color}]])
the value of 'records' is `UnsafeRow`, so the value will be overwritten
{color:#333333} {color}
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