[SPARK-24809] Serializing LongHashedRelation in executor may result in data error - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Critical
Resolution: Fixed
Affects Version/s: 2.0.0, 2.1.0, 2.2.0, 2.3.0
Fix Version/s: 2.1.4, 2.2.3, 2.3.2, 2.4.0
Component/s: SQL
Labels:
- correctness
Environment:

Spark 2.2.1

hadoop 2.7.1

Description

When join key is long or int in broadcast join, Spark will use LongHashedRelation as the broadcast value. Details see ~~SPARK-14419~~. But, if the broadcast value is abnormal big, executor will serialize it to disk. But, data will lost when serializing.