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From "Tim (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-12104) Flink Kafka fails with Incompatible KafkaProducer version / NoSuchFieldException sequenceNumbers
Date Fri, 05 Apr 2019 21:05:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-12104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16811250#comment-16811250

Tim commented on FLINK-12104:

I can confirm that this fix works.

> 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
> {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
> 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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