Hi,

这个是 Apache Kafka consumer 的一个已知问题,参见 FLINK-28060 [1] 和 KAFKA-13840 [2]。

[1] https://issues.apache.org/jira/browse/FLINK-28060
[2] https://issues.apache.org/jira/browse/KAFKA-13840

祝好,
庆盛

> On Jun 27, 2022, at 09:16, RS <tinyshr...@163.com> wrote:
> 
> Hi,
> 请教下各位,Flink-1.15.0,消费Kafka发现下面个问题,offset提交失败的情况,有的任务应该是一直提交失败的,数据消费了,但是offset不变,这种情况如何处理?
> 
> 
> 现象如下:
> 1. 任务没有异常,
> 2. 数据能正常消费处理,不影响数据使用
> 3. 任务有配置checkpoint,几分钟一次,理论上执行checkpoint的时候会提交offset
> 4. 部分任务的从Kafka的offset提交失败,部分正常
> 
> 
> WARN日志如下:
> 2022-06-27 01:07:42,725 INFO  
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] - Subtask 
> 0 checkpointing for checkpoint with id=11398 (max part counter=1).
> 2022-06-27 01:07:42,830 INFO  
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] - Subtask 
> 0 received completion notification for checkpoint with id=11398.
> 2022-06-27 01:07:43,820 INFO  
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] - Subtask 
> 0 checkpointing for checkpoint with id=11476 (max part counter=0).
> 2022-06-27 01:07:43,946 INFO  
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] - Subtask 
> 0 received completion notification for checkpoint with id=11476.
> 2022-06-27 01:07:45,218 INFO  
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] - Subtask 
> 0 checkpointing for checkpoint with id=11521 (max part counter=47).
> 2022-06-27 01:07:45,290 INFO  
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] - Subtask 
> 0 received completion notification for checkpoint with id=11521.
> 2022-06-27 01:07:45,521 WARN  
> org.apache.flink.connector.kafka.source.reader.KafkaSourceReader [] - Failed 
> to commit consumer offsets for checkpoint 11443
> org.apache.kafka.clients.consumer.RetriableCommitFailedException: Offset 
> commit failed with a retriable exception. You should retry committing the 
> latest consumed offsets.
> Caused by: org.apache.kafka.common.errors.CoordinatorNotAvailableException: 
> The coordinator is not available.
> 2022-06-27 01:07:45,990 WARN  
> org.apache.flink.connector.kafka.source.reader.KafkaSourceReader [] - Failed 
> to commit consumer offsets for checkpoint 11398
> org.apache.kafka.clients.consumer.RetriableCommitFailedException: Offset 
> commit failed with a retriable exception. You should retry committing the 
> latest consumed offsets.
> Caused by: org.apache.kafka.common.errors.CoordinatorNotAvailableException: 
> The coordinator is not available.
> 
> 
> Thanks~

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