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From "Tim (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-12104) Flink Kafka fails with Incompatible KafkaProducer version / NoSuchFieldException sequenceNumbers
Date Wed, 03 Apr 2019 17:00:00 GMT
Tim created FLINK-12104:

             Summary: Flink Kafka fails with Incompatible KafkaProducer version / NoSuchFieldException
                 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

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

Object transactionManager = getValue(kafkaProducer, "transactionManager");
Object sequenceNumbers = getValue(transactionManager, "sequenceNumbers");

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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