Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2244#discussion_r74392212
--- Diff:
flink-streaming-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/util/serialization/KeyedSerializationSchemaWrapper.java
---
@@ -16,12 +16,14 @@
*/
package org.apache.flink.streaming.util.serialization;
+import java.io.Serializable;
+
/**
* A simple wrapper for using the SerializationSchema with the
KeyedDeserializationSchema
* interface
* @param <T> The type to serialize
*/
-public class KeyedSerializationSchemaWrapper<T> implements
KeyedSerializationSchema<T> {
+public class KeyedSerializationSchemaWrapper<T> implements
KeyedSerializationSchema<T>, Serializable {
--- End diff --
`KeyedSerializationSchema` already implements `Serializable`.
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