Github user mushketyk commented on a diff in the pull request: https://github.com/apache/flink/pull/2244#discussion_r74634369 --- 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 -- Fixed.
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