Github user sihuazhou commented on a diff in the pull request:
https://github.com/apache/flink/pull/5732#discussion_r175983599
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/state/StateDescriptor.java
---
@@ -77,18 +80,22 @@
/** The serializer for the type. May be eagerly initialized in the
constructor,
* or lazily once the type is serialized or an ExecutionConfig is
provided. */
+ @Nullable
protected TypeSerializer<T> serializer;
+ /** The type information describing the value type. Only used to lazily
create the serializer
+ * and dropped during serialization */
+ @Nullable
--- End diff --
nit:Type information will not dropped during serialization now, it dropped
in `initializeSerializerUnlessSet()`.
---
