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Posted to issues@flink.apache.org by "Elias Levy (JIRA)" <ji...@apache.org> on 2019/04/03 18:04:03 UTC
[jira] [Commented] (FLINK-12104) Flink Kafka fails with
Incompatible KafkaProducer version / NoSuchFieldException sequenceNumbers
[ https://issues.apache.org/jira/browse/FLINK-12104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16808986#comment-16808986 ]
Elias Levy commented on FLINK-12104:
------------------------------------
The {{flink-connector-kafka-0.11}} depends on the Kafka 0.11.0.2 client, which does have that field. The field was only removed in 1.0.0. Are you overriding the Kafka client dependency? If so, that is your problem.
If you want to use a newer Kafka client, use the universal Kafka connection ({{flink-connector-kafka_2.11}}), which tracks the latest version of the Kafka client.
> Flink Kafka fails with Incompatible KafkaProducer version / NoSuchFieldException sequenceNumbers
> ------------------------------------------------------------------------------------------------
>
> Key: FLINK-12104
> URL: https://issues.apache.org/jira/browse/FLINK-12104
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: 1.7.2
> Reporter: Tim
> Priority: Major
>
> FlinkKafkaProducer (in flink-connector-kafka-0.11) tries to access a field named `sequenceNumbers` from the KafkaProducer's TransactionManager. You can find this line on the [master branch here|[https://github.com/apache/flink/blob/d6be68670e661091d94a3c65a2704d52fc0e827c/flink-connectors/flink-connector-kafka-0.11/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/FlinkKafkaProducer.java#L197].]
>
> {code:java}
> Object transactionManager = getValue(kafkaProducer, "transactionManager");
> ...
> Object sequenceNumbers = getValue(transactionManager, "sequenceNumbers");
> {code}
>
> However, the Kafka TransactionManager no longer has a "sequenceNumbers" field. This was changed back on 9/14/2017 (KAFKA-5494) in an effort to support multiple inflight requests while still guaranteeing idempotence. See [commit diff here|[https://github.com/apache/kafka/commit/5d2422258cb975a137a42a4e08f03573c49a387e#diff-f4ef1afd8792cd2a2e9069cd7ddea630].]
> Subsequently when Flink tries to "recoverAndCommit" (see FlinkKafkaProducer011) it fails with a "NoSuchFieldException: sequenceNumbers", followed by a "Incompatible KafkaProducer version".
> Given that the KafkaProducer used is so old (this change was made almost two years ago) are there any plans of upgrading? Or - are there some known compatibility issues that prevent Flink/Kafka connector from doing so?
>
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