[
https://issues.apache.org/jira/browse/FLINK-28060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17554949#comment-17554949
]
Qingsheng Ren commented on FLINK-28060:
---------------------------------------
Personally I prefer to upgrade the Kafka client. Downgrading the Kafka client
could introduce new bugs (like the one fixed in KAFKA-10793). I think the
backward compatibility of Kafka is trustable according to our previous
experience. On consumer side we don't use any hacks in Kafka source, purely
depend on APIs so I think it should be fine, but for the producer we use
[reflection|https://github.com/apache/flink/blob/c9a706b8388b324a37da43298e37074d0a452a34/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/sink/FlinkKafkaInternalProducer.java#L331-L343]
which is concerning. I can have a try to bump the version and see if it works.
Any ideas from [~becket_qin] ?
> Kafka Commit on checkpointing fails repeatedly after a broker restart
> ---------------------------------------------------------------------
>
> Key: FLINK-28060
> URL: https://issues.apache.org/jira/browse/FLINK-28060
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream, Connectors / Kafka
> Affects Versions: 1.15.0
> Environment: Reproduced on MacOS and Linux.
> Using java 8, Flink 1.15.0, Kafka 2.8.1.
> Reporter: Christian Lorenz
> Priority: Major
> Attachments: flink-kafka-testjob.zip
>
>
> When Kafka Offset committing is enabled and done on Flinks checkpointing, an
> error might occur if one Kafka broker is shutdown which might be the leader
> of that partition in Kafkas internal __consumer_offsets topic.
> This is an expected behaviour. But once the broker is started up again, the
> next checkpoint issued by flink should commit the meanwhile processed offsets
> back to kafka. Somehow this does not seem to happen always in Flink 1.15.0
> anymore and the offset committing is broken. An warning like the following
> will be logged on each checkpoint:
> {code}
> [info] 14:33:13.684 WARN [Source Data Fetcher for Source: input-kafka-source
> -> Sink: output-stdout-sink (1/1)#1] o.a.f.c.k.s.reader.KafkaSourceReader -
> Failed to commit consumer offsets for checkpoint 35
> [info] org.apache.kafka.clients.consumer.RetriableCommitFailedException:
> Offset commit failed with a retriable exception. You should retry committing
> the latest consumed offsets.
> [info] Caused by:
> org.apache.kafka.common.errors.CoordinatorNotAvailableException: The
> coordinator is not available.
> {code}
> To reproduce this I've attached a small flink job program. To execute this
> java8, scala sbt and docker / docker-compose is required. Also see readme.md
> for more details.
> The job can be run with `sbt run`, kafka cluster is started by
> `docker-compose up`. If then the kafka brokers are restarted gracefully by
> e.g. `docker-compose stop kafka1` and `docker-compose start kafka1` with
> kafka2 and kafka3 afterwards, this warning will occur and no offsets will be
> committed into kafka.
> This is not reproducible in flink 1.14.4.
--
This message was sent by Atlassian Jira
(v8.20.7#820007)
