[jira] [Created] (FLINK-12104) Flink Kafka fails with Incompatible KafkaProducer version / NoSuchFieldException sequenceNumbers

["Tim (JIRA)" <ji...@apache.org>]

Tim created FLINK-12104:
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             Summary: 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


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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