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https://issues.apache.org/jira/browse/FLINK-28060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17555303#comment-17555303
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Martijn Visser commented on FLINK-28060:
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I've opened a PR against {{master}} to bump Kafka Clients there.
I've also opened a draft PR against {{release-1.15}} - I'm not sure we're yet
OK with bumping Kafka Clients in a patch release, but I wanted to verify if CI
works for this one too. Given the limited change and the arguments brought
forward by [~renqs] on possible other bugs that we might re-introduce when we
downgrade, I would probably +1 to bump Kafka Clients for Flink 1.15.1
> 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
> Labels: pull-request-available
> 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.
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