tedyu commented on code in PR #48985:
URL: https://github.com/apache/spark/pull/48985#discussion_r1861446715
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sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/TransformWithStateExec.scala:
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@@ -83,6 +83,17 @@ case class TransformWithStateExec(
// dummy value schema, the real schema will get during state variable init
time
private val DUMMY_VALUE_ROW_SCHEMA = new StructType().add("value",
BinaryType)
+ // We need to just initialize key and value deserializer once per partition.
+ // The deserializers need to be lazily created on the executor since they
+ // are not serializable.
+ // Ideas for for improvement can be found here:
+ // https://issues.apache.org/jira/browse/SPARK-50437
+ private lazy val getKeyObj =
Review Comment:
Looks like `@transient` is missing for the lazy values.
Should we use `TransientLazy` to wrap `getKeyObj` and `getValueObj` to avoid
deadlock down the road ?
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