It is because the jar conflict and i have fixed it. I put flink-connector-kafka_2.11-1.10.0.jar in the flink lib directory. Also in my project pom file has the dependency flink-connector-kafka and builded as a fat jar
Thanks， Lei wangl...@geekplus.com.cn 发件人： Leonard Xu 发送时间： 2020-05-26 15:47 收件人： Aljoscha Krettek 抄送： user 主题： Re: java.lang.AbstractMethodError when implementing KafkaSerializationSchema Hi，wanglei I think Aljoscha is wright. Could you post your denpendency list? Dependency flink-connector-kafka is used in dataStream Application which you should use, dependency flink-sql-connector-kafka is used in Table API & SQL Application. We should only add one of them because the two dependency will conflict. Best, Leonard Xu 在 2020年5月26日，15:02，Aljoscha Krettek <aljos...@apache.org> 写道： I think what might be happening is that you're mixing dependencies from the flink-sql-connector-kafka and the proper flink-connector-kafka that should be used with the DataStream API. Could that be the case? Best, Aljoscha On 25.05.20 19:18, Piotr Nowojski wrote: Hi, It would be helpful if you could provide full stack trace, what Flink version and which Kafka connector version are you using? It sounds like either a dependency convergence error (mixing Kafka dependencies/various versions of flink-connector-kafka inside a single job/jar) or some shading issue. Can you check your project for such issues (`mvn dependency:tree` command [1]). Also what’s a bit suspicious for me is the return type: Lorg/apache/flink/kafka/shaded/org/apache/kafka/clients/producer/ProducerRecord; I’m not sure, but I was not aware that we are shading Kafka dependency in our connectors? Are you manually shading something? Piotrek [1] https://maven.apache.org/plugins/maven-dependency-plugin/examples/resolving-conflicts-using-the-dependency-tree.html <https://maven.apache.org/plugins/maven-dependency-plugin/examples/resolving-conflicts-using-the-dependency-tree.html> On 22 May 2020, at 15:34, wangl...@geekplus.com.cn wrote: public class MyKafkaSerializationSchema implements KafkaSerializationSchema<Tuple2<String, String>> { @Override public ProducerRecord<byte[], byte[]> serialize(Tuple2<String, String> o, @Nullable Long aLong) { ProducerRecord<byte[], byte[]> record = new ProducerRecord<>(o.f0, o.f1.getBytes(StandardCharsets.UTF_8)); return record; } } FlinkKafkaProducer<Tuple2<String, String>> producer = new FlinkKafkaProducer<Tuple2<String, String>>( "default", new MyKafkaSerializationSchema(), prop2,Semantic.EXACTLY_ONCE); But there's error when runnng： java.lang.AbstractMethodError: com.geekplus.flinketl.schema.MyKafkaSerializationSchema.serialize(Ljava/lang/Object;Ljava/lang/Long;)Lorg/apache/flink/kafka/shaded/org/apache/kafka/clients/producer/ProducerRecord; Any suggestion on this？ Thanks， Lei wangl...@geekplus.com.cn <mailto:wangl...@geekplus.com.cn>
