carp84 commented on a change in pull request #8570: [FLINK-12688] [state] Make
serializer lazy initialization thread safe in StateDescriptor
URL: https://github.com/apache/flink/pull/8570#discussion_r289273148
##########
File path:
flink-core/src/main/java/org/apache/flink/api/common/state/StateDescriptor.java
##########
@@ -82,8 +88,8 @@
/** The serializer for the type. May be eagerly initialized in the
constructor,
* or lazily once the {@link
#initializeSerializerUnlessSet(ExecutionConfig)} method
* is called. */
- @Nullable
- protected TypeSerializer<T> serializer;
+ @VisibleForTesting
+ protected final AtomicReference<TypeSerializer<T>>
serializerAtomicReference = new AtomicReference<>();
Review comment:
I was a little bit struggling about reducing the visibility but I agree
exposing this original serializer is dangerous. So I agree to reduce the
visibility to private.
And since `StateDescriptor` is annotated as `PublicEvolving`, will add a
release note about this on JIRA. Thanks.
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