adevore3 commented on issue #9738:
URL: https://github.com/apache/iceberg/issues/9738#issuecomment-1955227278
Sorry for the complex code sample. I verified that I can reproduce the error
w/ a more simple datasource:
```
case class JobArchiveOsirisDatasource(minTs: Long, inputPartitions:
Option[Int], useDfc: Boolean) extends Datasource {
def dataframe(spark: SparkSession): DataFrame = {
spark.sql("select * from db.table")
}
}
```
After further testing I figured out if I set the serializer to
JavaSerializer instead of using KryoSerializer then the error goes away.
I set this in my SessionBuilder's properties
```
"spark.serializer" -> "org.apache.spark.serializer.JavaSerializer"
```
Hope this helps w/ reproducing the error
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